Perhaps you should try some spelling variations:
thieu khang » thieu quang
chieu khong » chien chong, chu khong, chieu duong
cong thanh » dong thanh, cong trinh, truong thanh
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
cong tan » cong tac, cong san, cong ty
khang va » hang va, thang va, khang a

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