Perhaps you should try some spelling variations:
mot chieu » doi chieu, ho chieu
dung cong » dung trong
cong doan » cong dan, cong hoan, dong doanh
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
doan van » doan va, hoang van, luan van
doi chi » doi khi
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (doi chi)) xanh - ((anh tang) or (anh dang)) va dung cong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (doi chi)) xanh - ((anh tang) OR (anh dang)) va dung cong doan van ban.
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doi chi)) xanh - ((anh tang) or (anh dang)) va dung cong doan van ban*.