Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
van phong » van dong, hai phong
cong doan » cong dan, cong hoan, dong doanh
cong san » cong tac

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 - canh trinh van phong ((cong doan) or (cong san)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh trinh van phong ((cong doan) OR (cong san)) van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh trinh van phong ((cong doan) or (cong san)) van ban*.