Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tran xuan » tran quang
tran van » luan van
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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 quang - thanh ((tran xuan) or (tran van)) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - thanh ((tran xuan) OR (tran van)) nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - thanh ((tran xuan) or (tran van)) nhung cong tac toan cau*.