Perhaps you should try some spelling variations:
tieu tinh » trieu tinh, tieu trinh, lieu tinh
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
ty toan » tap toan, huy toan, tam toan
ly toan » le toan, ly hoan, ly tran

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 han cong ((ty toan) or (ly toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - anh tang luan han cong ((ty toan) OR (ly toan)) cau*.