SQL query wildcard

Hi,

I am trying to create a form that only takes one string and pass it to a sp, but this parameter will look into several fields. This is my code, it works for only one field. Any ideas?  thanks

Select DISTINCT 
	  F1, F2
From T1   
Where
	((@AnySearch is null) or (F1 LIKE '%' + @AnySearch + '%')) AND
	((@AnySearch is null) or (F2 LIKE '%' + @AnySearch + '%')) 

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