Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
tuan thong » toan thong, tran thong, tuan phong
thong cong » trong cong, tong cong, thong thong
cong vang » cong lang, cong quang, cong ngang
theo hoc » thao hoc, theo hop, cho hoc
vang can » nang can, vang van, nang cao
can ban » van ban, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo hoc) or (te hoc)) sach - thanh trung tuan thong cong vang can ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo hoc) OR (te hoc)) sach - thanh trung tuan thong cong vang can ban.
• Adding a wildcard symbol may retrieve word variants: ((theo hoc) or (te hoc)) sach - thanh trung tuan thong cong vang can ban*.