Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
xuc van » duc van, luc van, vuc van
dau xuc » dau xac, dau xua, dau nuoc
van dau » van dao, phan dau
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ((ky nang) or (v nang)) xa hoi. hieu van dau xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((ky nang) OR (v nang)) xa hoi. hieu van dau xuc van hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((ky nang) or (v nang)) xa hoi. hieu van dau xuc van hanh vi cua tre*".