Perhaps you should try some spelling variations:
cong thinh » cong trinh, cong thanh, cong tinh
doi chieu » doc hieu, doi chi, mot chieu
phat hanh » phat thanh, nhat hanh, pham hanh
hanh cong » thanh cong, hang cong, hanh dong
thinh dan » thinh doan, trinh dan, hinh dan
van phat » va phat, van chat, van phan
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: ((doi chieu) or (toc thieu)) sang - tan van phat hanh cong thinh dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sang - tan van phat hanh cong thinh dan ca*.