Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung hoac » trung hoc, trung hoa, trung ha
hoac khong » hoa khong, hoc khong, hay khong
hoc thieu » toc thieu, hoc hien
doc hieu » toc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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) or (doc hieu)) xanh - thanh trung hoac khong ((cong dan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) xanh - thanh trung hoac khong ((cong dan) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) xanh - thanh trung hoac khong ((cong dan) or (cong san)) phan cau*.