Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
tranh cua » doanh cua, manh cua
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
pham mau » pham dau, pham van, pham tai
pham ma » pham va, pham van, pham tai

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)) xanh - canh tranh cua dung cong tac ((pham mau) or (pham ma))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - canh tranh cua dung cong tac ((pham mau) OR (pham ma)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - canh tranh cua dung cong tac ((pham mau) or (pham ma))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - canh tranh cua dung cong tac ((pham mau) or (pham ma))*.