Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
truong va » truong dai, truong cao, truong dao
dang cong » dung cong
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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 ((trang va) or (truong va)) dang cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((trang va) OR (truong va)) dang cong dan van ban*.