Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thanh vi » thanh va, thanh ve, nhanh vi
toc sac » toc san, hoc sach, doc sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet

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: ((toc sac) OR (toc sach)) ky nang xa hoi. hieu van cam xuc van ((thanh vi) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sac) OR (toc sach)) ky nang xa hoi. hieu van cam xuc van ((thanh vi) or (hanh vi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sac) OR (toc sach)) ky nang xa hoi. hieu van cam xuc van ((thanh vi) or (hanh vi)) cua tre*.