Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
quan dung » quang dung, quan duong, quan dong
qua dung » quang dung, su dung, qua song
cong tap » cuong tap, cong tac, cong tan
tap quan » tac quan, hai quan
quan tap » quan tai, quan lap, quan tam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chinh sach) or (chiet tach)) - thanh trung ((quan dung) OR (qua dung)) cong tap quan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chinh sach) OR (chiet tach)) - thanh trung ((quan dung) OR (qua dung)) cong tap quan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chinh sach) or (chiet tach)) - thanh trung ((quan dung) OR (qua dung)) cong tap quan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chinh sach) or (chiet tach)) - thanh trung ((quan dung) OR (qua dung)) cong tap quan tap*.