Perhaps you should try some spelling variations:
vanh tai » van tai, hanh tai, anh tai
vanh dai » van dai, lanh dao, van dao
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
xuc va » duc va, tuc va, xac va
va cam » va cham, va cac, va cao
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: te sach ky nang x hoi. hieu va cam ((xuc va) or (luc va)) ((vanh dai) OR (vanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu va cam ((xuc va) OR (luc va)) ((vanh dai) OR (vanh tai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu va cam ((xuc va) or (luc va)) ((vanh dai) OR (vanh tai)) cua tre*".