Okey, now I finally solved it;

=IF(ISNA(VLOOKUP(C$2&" "&$A$3;Data!$A$1:$O$200;5;FALSE));"";IF(VLOOKUP(C$2&" "&$A$3;Data!$A$1:$O$200;5;FALSE)="";"";VLOOKUP(C$2&" "&$A$3;Data!$A$1:$O$200;5;FALSE)))

It will return blank if it is #N/Aor an empty cell. I used IF(logic, false, (IF(logic, false, true))