Perhaps you should try some spelling variations:
chieu khong » chien chong, chu khong, chieu duong
thieu sang » chieu sang, thieu khang, thieu quang
doanh hoan » doanh doanh, doanh khoa, doanh nhan
van hang » van khang, van hoang, van thang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va hang » va nang, va lang, va hanh

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) or (chieu khong)) - doanh hoan ((va hang) or (van hang)) cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu khong)) - doanh hoan ((va hang) OR (van hang)) cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu khong)) - doanh hoan ((va hang) or (van hang)) cong dan toan cau*.