Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
lang cong » dang cong, bang cong, hang cong
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap
va lang » va nang, hoa lang
khan ap » khan cap, han ap, khan dam

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 (theo tieu)) xanh - canh tranh va lang cong tan ((than cau) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo tieu)) xanh - canh tranh va lang cong tan ((than cau) OR (khan ap)).
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo tieu)) xanh - canh tranh va lang cong tan ((than cau) or (khan ap))*.