Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
hac thuc » hoc thuc, ha thuc, thach thuc
hoc sach » hoc sinh, hoc cac, hoc anh
thanh vi » hanh vi, thanh va, thanh ve
thuc ban » thuoc ban, thuc dan, thu ban
bo sach » co sach
cuu tre » cua tre, cau tren, cau treo
van hac » van hoc, van ha, van hai
ho nang » thi nang, kha nang, cao nang
ca tren » cau tren, cu tren, la tren
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((bo sach) or (hoc sach)) ho nang x hoi. thien van hac thuc ban thanh vi ((cuu tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (hoc sach)) ho nang x hoi. thien van hac thuc ban thanh vi ((cuu tre) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (hoc sach)) ho nang x hoi. thien van hac thuc ban thanh vi ((cuu tre) or (ca tren))*.