If a Value Doesn't Exist in a Table, Return ""

I'm using the following formula:

=INDEX($B$2:$B$251,MATCH(TRUE,INDEX(ISNUMBER(SEARCH($A$2:$A$251,H2)),0),0))

If the value is present within column H and A, then it returns the corresponding value from column B. But if there's no match between columns B and H, I get a value of "0". How can I get a value of "" instead of "0" when there's no match?

Thanks!