Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
ky tang » ky nang, ky trong, tay tang
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
tu san » thu san, tu ban, tu can

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: tu san ((((ky tang) OR (kho tang))) OR (ky dang)) xa hoi. hieu van cam luc va hang di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((((ky tang) OR (kho tang))) or (ky dang)) xa hoi. hieu van cam luc va hang di cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu san ((((ky tang) OR (kho tang))) or (ky dang)) xa hoi. hieu van cam luc va hang di cua tre*.