Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
dan canh » van canh, dan cach, dan hanh
dan can » dan chan, dan ca, ban can

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: theo chu sach - thanh trung cua thong thong ((dan can) OR (dan canh)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh trung cua thong thong ((dan can) or (dan canh)) cau*.