Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chieu » theo tieu, ho chieu, theo chu
hanh tang » hanh trang, hanh mang, hanh tung
anh tang » anh bang, anh dang, anh nang
cong tan » cong tac, cong san, cong thanh
doi chi » doi khi
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: ((theo chieu) or (doi chi)) xanh - ((hanh tang) or (anh tang)) va nhung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chi)) xanh - ((hanh tang) OR (anh tang)) va nhung cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chi)) xanh - ((hanh tang) or (anh tang)) va nhung cong tan van ban*.