Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung cua » truong cua, trung tuan, trung cap
manh toan » thanh toan, anh tuan, tinh toan
cua dung » cua dang, cua dong, qua dung
dung ung » dung cong
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chinh sach) or (chieu sang)) - thanh trung cua dung ung ((dan than) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chinh sach) OR (chieu sang)) - thanh trung cua dung ung ((dan than) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (chieu sang)) - thanh trung cua dung ung ((dan than) or (manh toan)) cao*.