Perhaps you should try some spelling variations:
phuong dong » phuong dung, phuong hoang, chuong duong
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, cong tac
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 ((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 ((toan tap) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - anh tranh cac phuong dong tai ((toan tap) or (toan cao))*.