Formula to do searching TEXT

Hi

I may have simple question,
I have a column ( column A)to search "flavor", if I find the work "flavor", then in column B ( new column), I will type YES, if not ,I will type NO

the following seems not working, know why?

=IF(ISTEXT(SEARCH("Flavor",F1)),"YES","NO")

Thanks
James

=IF(ISNUMBER(SEARCH("Flavor",F1)),"YES","NO")

Thanks, its working, 1 questions

#1, why can't I use ISTEXT?
#2, how to do wildcard? can I do =IF(ISNUMBER(SEARCH("*Flavor*",F1)),"YES","NO") in order to search "Flavored"?

1. What does SEARCH return? What does ISTEXT do?

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