Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
hieu van » hieu va, thien van, lieu va
thanh va » hanh va, thanh ha, thanh ve
vu sach » vu bach, su sach, vu khach
cac toc » cac toi, cac nuoc, cac thoi
sach ky » sac ky, sach y, sach ty
cac tuc » cac tu, cac tac, cac nuoc
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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: vu sach ky nang x hoi. hieu van ((cac tuc) OR (cac toc)) va ((thanh va) OR (thanh van)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu van ((cac tuc) or (cac toc)) va ((thanh va) OR (thanh van)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu van ((cac tuc) or (cac toc)) va ((thanh va) OR (thanh van)) cua tre*.