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 san » cong tac
san toan » van toan, dan toan, manh 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 san toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - thanh ((tran xuan) OR (tran van)) nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - thanh ((tran xuan) OR (tran van)) nhung cong san toan cau*.