Perhaps you should try some spelling variations:
tien hoat » trien hoat, thien hoat, tien hoa
quang ban » quang binh, quang tuan, quang tran
hieu soat » hieu suat, hieu hoat, hieu luat
van tien » toan tien, van tuan
van hieu » cao hieu
ban van » ban dan, ban va, tan van
luan » quan, lan

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

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