Perhaps you should try some spelling variations:
tinh huong » dinh huong, anh huong
quang toan » quang tuan, quang tran, quang doan
tinh dung » trinh dung, tin dung, anh dung
hieu suat » hieu luat, hieu qua
kiem soat » kiem toan
van hieu » cao hieu
toan va » doan va, tran van, toan ban
va kiem » van kien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((tinh dung) OR (tinh huong)) luan van hieu suat ) or ( tinh quang toan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((tinh dung) OR (tinh huong)) luan van hieu suat ) OR ( tinh quang toan va kiem soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((tinh dung) OR (tinh huong)) luan van hieu suat ) or ( tinh quang toan va kiem soat ))".
• Adding a wildcard symbol may retrieve word variants: (( ((tinh dung) OR (tinh huong)) luan van hieu suat ) or ( tinh quang toan va kiem soat ))*.