How to use like condition within IF-ELSE condition in RTF/BI Publisher

Hello Folks,

Can somebody please help me with below requirements to achieve.

I want to display heading value as null in report if below condition does meet the criteria else 'Gross Units'.

While using like condition it does not work

Approach#1

<?xdofx:if (g4_Title_RULE like '%First%Title%Desc%' or Q4_ROYALTY_EARNINGS_RULE like '%Second%Title%Desc%')  

then ''

 else

'Gross Units'

end if?>

Approach#2

<?xdofx:if (@row:starts-with(Q4_ROYALTY_EARNINGS_RULE,'Multi') or @row:starts-with(Q4_ROYALTY_EARNINGS_RULE,'Single '))

 then ''

 else

  'Gross Units'

end if?>

Thanks in advance, please as soon possible, requirement is quite critical.