Perhaps you should try some spelling variations:
anh truong » manh truong, anh thuong, anh trong
hieu quang » thieu quang, hieu qua, diep quang
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
truong va » truong dai, truong cao, truong dao
tan luan » tang luan, toan luan, san luan
dan luan » doanh luan, dung luan, tang luan

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 quang) OR (hieu quan)) - anh truong va nhung cong ((tan luan) or (dan luan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (hieu quan)) - anh truong va nhung cong ((tan luan) OR (dan luan)) van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu quang) OR (hieu quan)) - anh truong va nhung cong ((tan luan) or (dan luan)) van".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) OR (hieu quan)) - anh truong va nhung cong ((tan luan) or (dan luan)) van*.