Limit "WHERE condition" in Repeater with custom query

Dear All,

Here my error message "The entered values cannot be saved. Please see the fields below for details. WHERE condition: Maximum allowed length of the input text is 500."

Here my WHERE Condition "(p.projectName LIKE '%{% SQLEscape(QueryString.GetValue("name", ""))#%}%' or p.projectName IS NULL) AND (p.theme LIKE '%{% SQLEscape(QueryString.GetValue("theme", ""))#%}%' or p.theme IS NULL) AND (p.keywords LIKE '%{% SQLEscape(QueryString.GetValue("keyword", ""))#%}%' or p.keyword IS NULL)"

My Character length just 292 Characters but i got error message when i try Save Webpart. I am not sure about "WHERE condition" work with multi condition query string.

Do you have any idea fix this issue?

Thanks