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
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nam xuc » cam xuc, nam xua, nam thuc
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
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: su sach ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc va thanh vi cua tre*.