Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung gian » truong giang, truong giao, trong giang
doi chieu » doc hieu, doi chi, mot chieu
gian dan » gian lang
dan cong » dang cong, van cong, dan dong
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: ((doi chieu) or (toc thieu)) sach - thanh trung gian dan cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh trung gian dan cong tan van ban*.