Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dang » thanh hang, thanh dan, thanh dong
hieu manh » chieu xanh, hieu nganh, dieu hanh
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
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: ho ((chieu sang) or (hieu manh)) - thanh trung thanh dang cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu manh)) - thanh trung thanh dang cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu manh)) - thanh trung thanh dang cong tan van ban*.