Containsstringexact or containsstring but NOT substring, only whole selected word?

Thanks for bhanu_gautam's concern about this issue.

Hi, SevsBo 

Since you didn't provide me with some test data, I assumed some data myself for testing:

You can then create a Calculated column to determine the original name if it is Red Box or Green Box, and null if it is not:

ExactMatch = 
IF (
    ([Product Name] = "Red Box") || ([Product Name] = "Green Box"),
    [Product Name],
    BLANK()
)

Then create a Measure:

ExactMatchMeasure = 
COUNTAX (
    FILTER (
        'Table',
        NOT(ISBLANK([ExactMatch]))
    ),
    [ExactMatch]
)

Finally drag the created Measure to the Filters panel to filter the data:

I have attached the pbix file for this simple example below, I hope it helps.

I hope my suggestions give you good ideas, if you have any more questions, please clarify in a follow-up reply.
Best Regards,
Fen Ling,
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.