Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
hoc tien » hoc tieng, hoc hien, hoc vien
tac hang » tac vang, bac thang, tac chong
nong dan » cong dan, nong san, nguong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
cac van » cac dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien thanh - thanh cong ((tac hang) or (cac van)) nong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien thanh - thanh cong ((tac hang) OR (cac van)) nong dan than cao*.