Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu qua, diep quang
hieu quan » hieu qua, lieu quan, thien quan
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan cong » luat cong, luong cong, luan chung
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quan) or (hieu quang)) - hanh tang luan cong ((cong manh) or (cong danh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (hieu quang)) - hanh tang luan cong ((cong manh) OR (cong danh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) or (hieu quang)) - hanh tang luan cong ((cong manh) or (cong danh)) toan ban*.