Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
doc hieu » toc thieu, hoc hien
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) xanh - thanh trung cua cong ((cong ban) or (cong san)) hang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - thanh trung cua cong ((cong ban) OR (cong san)) hang ca.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - thanh trung cua cong ((cong ban) or (cong san)) hang ca*.