Perhaps you should try some spelling variations:
thieu khang » thieu quang
chieu khong » chien chong, chu khong, chieu duong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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: hoc ((thieu khang) OR (chieu khong)) - hanh tranh cua cong ((cong tan) OR (cong san)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu khong)) - hanh tranh cua cong ((cong tan) OR (cong san)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (chieu khong)) - hanh tranh cua cong ((cong tan) OR (cong san)) toan ban*.