Find Word In Range Cells Containing Other Strings

I am having a hard time creating a code that would search the exact string in a cell. See sample scenario below.

1. I have a string "hello" to be searched.

2. I will search the whole string in each cell in a previously declared range.

3. If in a cell i found "kdhlsk hellodsiewjls", although "hello" string is there,
the code should still return 0.

4. But if in a cell, i found "kjdsfel ljsdlkue hello luoeww", then the code should return 1.

I have already created a code, but it will always return 1 in step#3.