Perhaps you should try some spelling variations:
dong tuong » dong thuong, dong thong, dong trong
tuong tham » luong tham, tuong tac, trong thai
hoc thieu » hoc hien
thanh tan » thanh toan, thanh tuan, thanh san
tham phan » than phan, thai phan, thanh phan
phan van » pham van, thanh van, luan van
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) sang - thanh tan van dong tuong tham phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sang - thanh tan van dong tuong tham phan van.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sang - thanh tan van dong tuong tham phan van*.