Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
kha tang » kha nang, kho tang, phap tang
toan cao » toan ban, toan tap
ha tang » phap tang, cao tang, kho tang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - thanh trung ((ha tang) OR (kha tang)) cong thanh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chinh sach)) - thanh trung ((ha tang) or (kha tang)) cong thanh toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chinh sach)) - thanh trung ((ha tang) or (kha tang)) cong thanh toan cao*.