Perhaps you should try some spelling variations:
quang phuong » bang phuong, dung phuong, hoang phuong
phuong dung » thong dung, cuong dung, phuong hoang
hieu lang » chieu sang, hieu quang, nhieu tang
canh tinh » hanh tinh, manh tinh, canh tranh
dung manh » duong manh, dung danh, hung manh
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh tinh quang phuong dung manh ((((toan tap) OR (toan ban))) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tinh quang phuong dung manh ((((toan tap) or (toan ban))) or (toan cao))*.