Perhaps you should try some spelling variations:
thanh trung » thanh tung
quan trong » gian trong
quang dong » quang dung, quan dong, quang cuong
doi chieu » doc hieu, ho chieu, mot chieu
cong tan » cong tac, cong san, cong thanh
doi chi » doi khi
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doi chi)) xanh - thanh trung ((quan trong) or (quang dong)) cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - thanh trung ((quan trong) OR (quang dong)) cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - thanh trung ((quan trong) or (quang dong)) cong tan van ban*.