Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu quang, hieu lang
nguong dan » huong dan
trung cap » truong cao, trung tam
cap bang » cao bang, can bang, lap bang
cong dan » cong san, cong tan, huong dan
toan tap » toan ban

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 (thieu khang)) - thanh trung cap bang ((cong dan) or (nguong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh trung cap bang ((cong dan) OR (nguong dan)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - thanh trung cap bang ((cong dan) or (nguong dan)) toan tap*".