Perhaps you should try some spelling variations:
quang tran » quang tuan, quang trung, quang thanh
tinh dung » trinh dung, tin dung, tinh huong
hieu soat » hieu suat, hieu hoat, hieu luat
kien soat » bien soan, kien hoa, dien hoat
kiem soat » kiem toan
luan cao » juan cao, luan bao, quang cao
tran van » luan van

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 luan cao hieu soat ) or ( tinh quang tran van ((kien soat) or (kiem soat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan cao hieu soat ) OR ( tinh quang tran van ((kien soat) OR (kiem soat)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan cao hieu soat ) or ( tinh quang tran van ((kien soat) or (kiem soat)) ))*.