Perhaps you should try some spelling variations:
tieu tinh » trieu tinh, tieu trinh, lieu tinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
van thanh » ban thanh, van tuan
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
van toan » van tuan, van tan, manh toan

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 - hanh tang luan han cong ((van toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hanh tang luan han cong ((van toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - hanh tang luan han cong ((van toan) or (van thanh)) cao*.