Perhaps you should try some spelling variations:
thanh tung » thanh cong
dong cong » duong cong, dung cong, dang cong
ho chieu » theo chieu, hoc thieu, doi chieu
tung cua » trung cua, tuong cua, dung cua
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
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: ((ho chieu) or (hoc hien)) xanh - thanh tung cua dong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc hien)) xanh - thanh tung cua dong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc hien)) xanh - thanh tung cua dong cong tan van ban*.