Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
tran van » luan van
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan cac » nhan cach, phan dau, phan lap
lan van » luan van, lang van, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - hanh ((tran van) or (lan van)) trong cong tac phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh ((tran van) OR (lan van)) trong cong tac phan cac.
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh ((tran van) or (lan van)) trong cong tac phan cac*.