Perhaps you should try some spelling variations:
thieu quang » thien quan, trien quang, hieu quan
hieu quang » hieu quan, hieu qua, diep quang
anh truong » manh truong, anh thuong, anh trong
nhung cong » dung cong, thong cong, hang cong
truong va » truong dai, truong cao, truong dao
tang luan » dung luan
tan luan » toan luan, dan luan, san 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 (thieu quang)) - anh truong va nhung cong ((tan luan) or (tang luan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (thieu quang)) - anh truong va nhung cong ((tan luan) OR (tang luan)) van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu quang) OR (thieu quang)) - anh truong va nhung cong ((tan luan) or (tang luan)) van".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) OR (thieu quang)) - anh truong va nhung cong ((tan luan) or (tang luan)) van*.