Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
thanh lap » thanh san, phan lap, thanh hai
trung va » truong va, trang va, trung ha
va khong » va thong, va phong, va thuong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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 xanh - thanh trung va khong ((cong dan) or (cong tan)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung va khong ((cong dan) OR (cong tan)) thanh lap.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung va khong ((cong dan) or (cong tan)) thanh lap*.