Perhaps you should try some spelling variations:
tieu tinh » trieu tinh, tieu trinh, lieu tinh
tang luan » dung luan
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
danh toan » manh toan, anh toan, dan toan
anh tang » anh bang, anh dang, anh nang
toan tu » toan du, tran tu, doan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu tinh - anh tang luan ((hang cong) or (dang cong)) danh toan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - anh tang luan ((hang cong) OR (dang cong)) danh toan tu*.