Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
dang cuong » dang cong, tang cuong, quang cuong
hieu lang » chieu sang, nhieu tang, hieu van
tang luan » dung luan
luan dang » luan nang, luan danh, luan dong
cuong cac » luong cac, cong cac, trong cac
anh tang » anh bang, anh dang, anh nang
nhan cau » nhanh cau, phan cau, nhan sau
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) or (hieu quang)) - anh tang luan dang cuong cac ((nhan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (hieu quang)) - anh tang luan dang cuong cac ((nhan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (hieu quang)) - anh tang luan dang cuong cac ((nhan cau) or (phan cac))*.