Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien quan » thien quan, vien quan, hieu quan
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac
lien » bien, vien, tien

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien quan) OR (lien quan)) - thanh trung ((cua khong) or (hua khong)) cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien quan) OR (lien quan)) - thanh trung ((cua khong) OR (hua khong)) cong dan than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien quan) OR (lien quan)) - thanh trung ((cua khong) or (hua khong)) cong dan than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien quan) OR (lien quan)) - thanh trung ((cua khong) or (hua khong)) cong dan than cap*.