Perhaps you should try some spelling variations:
thanh trung » thanh tung
va truong » van truong, xa truong, va thuong
va trong » va thong, va tuong, va trung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
so dieu » bo dieu, hoc dieu
co lieu » cot lieu, co hieu, so lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so dieu) or (co lieu)) tinh - thanh trung ((va trong) OR (va truong)) cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so dieu) OR (co lieu)) tinh - thanh trung ((va trong) OR (va truong)) cong dan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so dieu) or (co lieu)) tinh - thanh trung ((va trong) OR (va truong)) cong dan toan cao*".