Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
doc hieu » toc thieu, hoc hien
cua dong » chua dong, cua dang, cua nong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
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: ((hoc thieu) or (doc hieu)) xanh - thanh trung ((cua dong) or (cua cong)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) xanh - thanh trung ((cua dong) OR (cua cong)) cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) xanh - thanh trung ((cua dong) or (cua cong)) cong tac than cau*.