Perhaps you should try some spelling variations:
tinh huong » dinh huong, anh huong
huong luan » huong lan, cuong luan, huong loan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
tuan va » toan va, luan va, than va
quan va » quan vi, quan ha, luan va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh huong luan van hieu soat ) or ( tinh quang ((tuan va) or (quan va)) kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh huong luan van hieu soat ) OR ( tinh quang ((tuan va) OR (quan va)) kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh huong luan van hieu soat ) or ( tinh quang ((tuan va) or (quan va)) kiem soat ))*.