Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thi chieu » thi chien, thi hieu, theo chieu
cong khan » cong khanh, cong nhan, cong phan
khan nang » kha nang, phan nang, chang nang
nang cong » nang song, dang cong, bang cong
thanh van » thanh san, thanh toan, thanh phan
ho chieu » theo chieu, hoc thieu, mot chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (thi chieu)) xanh - thanh cong khan nang cong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (thi chieu)) xanh - thanh cong khan nang cong thanh van ban*.