Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
va dung » van dung, va duong, vat dung
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 (doi chieu))) or (theo tieu)) xanh - canh tranh va dung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chieu) OR (doi chieu))) OR (theo tieu)) xanh - canh tranh va dung cong tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ho chieu) OR (doi chieu))) or (theo tieu)) xanh - canh tranh va dung cong tan van ban".
• Adding a wildcard symbol may retrieve word variants: ((((ho chieu) OR (doi chieu))) or (theo tieu)) xanh - canh tranh va dung cong tan van ban*.