Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
manh tinh » man tinh, manh binh, canh tinh
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu
tinh va » tich va, trinh van, trinh vat
va nang » van nang, da nang, cam nang

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 quang - manh tinh va nang ((cong manh) OR (cong danh)) ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - manh tinh va nang ((cong manh) or (cong danh)) ((toan tap) or (toan ban))*.