Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
bang luan » tang luan, hang luan, tong luan
cong vang » cong lang, cong ngang, cong san
thanh cao » thanh ca, thanh cac, thanh thao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tinh - hanh ((bang luan) or (dung luan)) dang ((cong vang) OR (cong quang)) thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh ((bang luan) OR (dung luan)) dang ((cong vang) OR (cong quang)) thanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh ((bang luan) or (dung luan)) dang ((cong vang) OR (cong quang)) thanh cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((bang luan) or (dung luan)) dang ((cong vang) OR (cong quang)) thanh cao*.