Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
te sach » toc sach
dau xuc » dau xua, dau nuoc
dau xac » dau xay, dan xac
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
x hoi » o hoi, x ho, 5 hoi

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 y nang ((x hoi) or (xa hoi)). hieu van ((dau xuc) OR (dau xac)) va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((x hoi) OR (xa hoi)). hieu van ((dau xuc) OR (dau xac)) va thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((x hoi) or (xa hoi)). hieu van ((dau xuc) OR (dau xac)) va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((x hoi) or (xa hoi)). hieu van ((dau xuc) OR (dau xac)) va thanh vi cua tre*.