Perhaps you should try some spelling variations:
chieu khong » chien chong, chu khong, chieu duong
thieu sang » chieu sang, thieu khang, thieu quang
hanh dung » thanh dung, anh dung, hanh dong
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sang) OR (chieu khong)) - hanh dung luan hang cong dan toan cao~.
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sang) or (chieu khong)) - hanh dung luan hang cong dan toan cao*.