Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
nhung cong » dung cong, thong cong, hang cong
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) OR (ho thiet)) tach - thanh ((trung thanh) or (truong thanh)) nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - thanh ((trung thanh) OR (truong thanh)) nhung cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (ho thiet)) tach - thanh ((trung thanh) or (truong thanh)) nhung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (ho thiet)) tach - thanh ((trung thanh) or (truong thanh)) nhung cong dan than cau*.