Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (toc sach)) ky nang o hoi. hieu ve cac xuc va ((thanh vi) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) ky nang o hoi. hieu ve cac xuc va ((thanh vi) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (toc sach)) ky nang o hoi. hieu ve cac xuc va ((thanh vi) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (toc sach)) ky nang o hoi. hieu ve cac xuc va ((thanh vi) OR (hanh vi)) cua tre*.