Perhaps you should try some spelling variations:
thanh tung » thanh cong
cap thong » cap tong, chap thuong, phap thong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
tung cap » trung cap, cung cap, thong cap
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 tung cap thong thong ((dan can) OR (dan canh)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh tung cap thong thong ((dan can) or (dan canh)) cau*.