Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tran xuan » tran quang, tran van
quan van » luan van, quan va, quan luan
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, 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 sang - thanh ((tran xuan) or (quan van)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((tran xuan) OR (quan van)) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((tran xuan) or (quan van)) nhung cong dan toan cau*.