Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
dinh tu » danh tu, tinh tu, dinh du
dinh cu » dinh cuu, dinh chuc, dinh chau
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, ve cac
x hoi » o hoi, x ho, 5 hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ((x hoi) OR (xa hoi)). hieu ve cau luc van ((dinh tu) OR (dinh cu)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ((x hoi) or (xa hoi)). hieu ve cau luc van ((dinh tu) OR (dinh cu)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ((x hoi) or (xa hoi)). hieu ve cau luc van ((dinh tu) OR (dinh cu)) cua tre*.