Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
dung cong » dung trong
tran tien » tran thien, toan tien, tran hien
trung ap » trung cap, trung lap, trung tam
dan tren » dat tren, dau tren, van tren
ap dung » xay dung, van dung

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 sach) OR (chinh sach)) - thanh trung ap dung cong ((tran tien) or (dan tren)) chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chinh sach)) - thanh trung ap dung cong ((tran tien) OR (dan tren)) chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chinh sach)) - thanh trung ap dung cong ((tran tien) or (dan tren)) chau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chinh sach)) - thanh trung ap dung cong ((tran tien) or (dan tren)) chau*.