Perhaps you should try some spelling variations:
cac phuong » cac truong
hieu lang » chieu sang, hieu quang, nhieu tang
anh tranh » canh tranh, lanh tranh, anh thanh
tranh cac » trinh cac, thanh cac, tranh cai
nho hieu » nha hieu, nho sieu, nhu hieu
dong tai » dung tai, luong tai, hang tai
cong tac » cong ty
toan tap » toan ban
toan cao » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho hieu lang - anh tranh cac phuong ((dong tai) OR (cong tac)) ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - anh tranh cac phuong ((dong tai) OR (cong tac)) ((toan tap) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho hieu lang - anh tranh cac phuong ((dong tai) OR (cong tac)) ((toan tap) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - anh tranh cac phuong ((dong tai) OR (cong tac)) ((toan tap) or (toan cao))*.