Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
hanh tran » hanh trang, thanh tran, hanh tram
cong vang » cong lang, cong quang, cong ngang
tran van » luan van
van dung » van dong, xay dung, tin dung
cong van » cong san, song van, cong tan
than man » than ma, thanh san, tran manh

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 dung ((cong van) OR (cong vang)) than man~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - hanh tran van dung ((cong van) OR (cong vang)) than man*".