diff --git a/adjust.go b/adjust.go
index 5d6004067c9159a258075f242f1a6c1d6300fb57..75faf16ad6a6a3b2a86bf297e2d4d4a9812150f0 100644
--- a/adjust.go
+++ b/adjust.go
@@ -320,7 +320,9 @@ func adjustFormulaColumnName(name, operand string, abs, keepRelative bool, dir a
 		return "", operand, false, err
 	}
 	if dir == columns && col >= num {
-		col += offset
+		if col += offset; col < 1 {
+			col = 1
+		}
 		colName, err := ColumnNumberToName(col)
 		return "", operand + colName, false, err
 	}
@@ -334,8 +336,10 @@ func adjustFormulaRowNumber(name, operand string, abs, keepRelative bool, dir ad
 	}
 	row, _ := strconv.Atoi(name)
 	if dir == rows && row >= num {
-		row += offset
-		if row <= 0 || row > TotalRows {
+		if row += offset; row < 1 {
+			row = 1
+		}
+		if row > TotalRows {
 			return "", operand + name, false, ErrMaxRows
 		}
 		return "", operand + strconv.Itoa(row), false, nil
diff --git a/calc.go b/calc.go
index 496ecd41eec32b6bd4986cab6d2322cd21b12119..be5f6416aa063f25f0ae6db641c7070b00083e6c 100644
--- a/calc.go
+++ b/calc.go
@@ -11602,7 +11602,22 @@ func (fn *formulaFuncs) ISNUMBER(argsList *list.List) formulaArg {
 	if argsList.Len() != 1 {
 		return newErrorFormulaArg(formulaErrorVALUE, "ISNUMBER requires 1 argument")
 	}
-	if argsList.Front().Value.(formulaArg).Type == ArgNumber {
+	arg := argsList.Front().Value.(formulaArg)
+	if arg.Type == ArgMatrix {
+		var mtx [][]formulaArg
+		for _, row := range arg.Matrix {
+			var array []formulaArg
+			for _, val := range row {
+				if val.Type == ArgNumber {
+					array = append(array, newBoolFormulaArg(true))
+				}
+				array = append(array, newBoolFormulaArg(false))
+			}
+			mtx = append(mtx, array)
+		}
+		return newMatrixFormulaArg(mtx)
+	}
+	if arg.Type == ArgNumber {
 		return newBoolFormulaArg(true)
 	}
 	return newBoolFormulaArg(false)
@@ -11951,11 +11966,14 @@ func (fn *formulaFuncs) OR(argsList *list.List) formulaArg {
 				return newStringFormulaArg(strings.ToUpper(strconv.FormatBool(or)))
 			}
 		case ArgMatrix:
-			// TODO
-			return newErrorFormulaArg(formulaErrorVALUE, formulaErrorVALUE)
+			args := list.New()
+			for _, arg := range token.ToList() {
+				args.PushBack(arg)
+			}
+			return fn.OR(args)
 		}
 	}
-	return newStringFormulaArg(strings.ToUpper(strconv.FormatBool(or)))
+	return newBoolFormulaArg(or)
 }
 
 // SWITCH function compares a number of supplied values to a supplied test
@@ -13741,34 +13759,48 @@ func (fn *formulaFuncs) find(name string, argsList *list.List) formulaArg {
 	if args.Type != ArgList {
 		return args
 	}
-	findText := argsList.Front().Value.(formulaArg).Value()
+	findTextArg := argsList.Front().Value.(formulaArg)
 	withinText := argsList.Front().Next().Value.(formulaArg).Value()
 	startNum := int(args.List[0].Number)
-	if findText == "" {
-		return newNumberFormulaArg(float64(startNum))
-	}
 	dbcs, search := name == "FINDB" || name == "SEARCHB", name == "SEARCH" || name == "SEARCHB"
-	if search {
-		findText, withinText = strings.ToUpper(findText), strings.ToUpper(withinText)
-	}
-	offset, ok := matchPattern(findText, withinText, dbcs, startNum)
-	if !ok {
-		return newErrorFormulaArg(formulaErrorVALUE, formulaErrorVALUE)
-	}
-	result := offset
-	if dbcs {
-		var pre int
-		for idx := range withinText {
-			if pre > offset {
-				break
+	find := func(findText string) formulaArg {
+		if findText == "" {
+			return newNumberFormulaArg(float64(startNum))
+		}
+		if search {
+			findText, withinText = strings.ToUpper(findText), strings.ToUpper(withinText)
+		}
+		offset, ok := matchPattern(findText, withinText, dbcs, startNum)
+		if !ok {
+			return newErrorFormulaArg(formulaErrorVALUE, formulaErrorVALUE)
+		}
+		result := offset
+		if dbcs {
+			var pre int
+			for idx := range withinText {
+				if pre > offset {
+					break
+				}
+				if idx-pre > 1 {
+					result++
+				}
+				pre = idx
 			}
-			if idx-pre > 1 {
-				result++
+		}
+		return newNumberFormulaArg(float64(result))
+	}
+	if findTextArg.Type == ArgMatrix {
+		var mtx [][]formulaArg
+		for _, row := range findTextArg.Matrix {
+			var array []formulaArg
+			for _, findText := range row {
+				array = append(array, find(findText.Value()))
 			}
-			pre = idx
+			mtx = append(mtx, array)
 		}
+		return newMatrixFormulaArg(mtx)
 	}
-	return newNumberFormulaArg(float64(result))
+	return find(findTextArg.Value())
 }
 
 // LEFT function returns a specified number of characters from the start of a
diff --git a/calc_test.go b/calc_test.go
index 350e51651108adceceb2f53d7a92b61bf0047f93..123db378bdf290ad2c9f4a7fafb329fdee92f83f 100644
--- a/calc_test.go
+++ b/calc_test.go
@@ -1451,8 +1451,9 @@ func TestCalcCellValue(t *testing.T) {
 		"=ISNONTEXT(\"Excelize\")": "FALSE",
 		"=ISNONTEXT(NA())":         "TRUE",
 		// ISNUMBER
-		"=ISNUMBER(A1)": "TRUE",
-		"=ISNUMBER(D1)": "FALSE",
+		"=ISNUMBER(A1)":    "TRUE",
+		"=ISNUMBER(D1)":    "FALSE",
+		"=ISNUMBER(A1:B1)": "TRUE",
 		// ISODD
 		"=ISODD(A1)": "TRUE",
 		"=ISODD(A2)": "FALSE",
@@ -1526,6 +1527,7 @@ func TestCalcCellValue(t *testing.T) {
 		"=OR(1=2,2=3)":            "FALSE",
 		"=OR(1=1,2=3)":            "TRUE",
 		"=OR(\"TRUE\",\"FALSE\")": "TRUE",
+		"=OR(A1:B1)":              "TRUE",
 		// SWITCH
 		"=SWITCH(1,1,\"A\",2,\"B\",3,\"C\",\"N\")": "A",
 		"=SWITCH(3,1,\"A\",2,\"B\",3,\"C\",\"N\")": "C",
@@ -1748,6 +1750,7 @@ func TestCalcCellValue(t *testing.T) {
 		"=FIND(\"\",\"Original Text\")":    "1",
 		"=FIND(\"\",\"Original Text\",2)":  "2",
 		"=FIND(\"s\",\"Sales\",2)":         "5",
+		"=FIND(D1:E2,\"Month\")":           "1",
 		// FINDB
 		"=FINDB(\"T\",\"Original Text\")":   "10",
 		"=FINDB(\"t\",\"Original Text\")":   "13",
@@ -3663,7 +3666,6 @@ func TestCalcCellValue(t *testing.T) {
 		"=NOT(\"\")":  {"#VALUE!", "NOT expects 1 boolean or numeric argument"},
 		// OR
 		"=OR(\"text\")":                          {"#VALUE!", "#VALUE!"},
-		"=OR(A1:B1)":                             {"#VALUE!", "#VALUE!"},
 		"=OR(\"1\",\"TRUE\",\"FALSE\")":          {"#VALUE!", "#VALUE!"},
 		"=OR()":                                  {"#VALUE!", "OR requires at least 1 argument"},
 		"=OR(1" + strings.Repeat(",1", 30) + ")": {"#VALUE!", "OR accepts at most 30 arguments"},
@@ -4773,7 +4775,7 @@ func TestCalcOR(t *testing.T) {
 	})
 	fn := formulaFuncs{}
 	result := fn.OR(argsList)
-	assert.Equal(t, result.String, "FALSE")
+	assert.Equal(t, result.Value(), "FALSE")
 	assert.Empty(t, result.Error)
 }