Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dua tren » dung tren
thanh vi » hanh vi, thanh va, thanh ve
thu sach » thuat sach, thuoc sach, thu hoach
chat xuc » chat huu, cam xuc, chao xu
van chat » cao chat
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
tu sach » su sach, te sach, tu cach
van hoi » van hoa, van hoe, van loi
ky lang » ky nang, ky dang, ky tang
van hoc » van hoa
vi dua » vi du, vi dum, vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ky lang ((van hoi) or (van hoc)). hieu van chat xuc ban thanh vi dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky lang ((van hoi) OR (van hoc)). hieu van chat xuc ban thanh vi dua tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky lang ((van hoi) or (van hoc)). hieu van chat xuc ban thanh vi dua tren*.