Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dung doi » huong doi, dung tai, dung co
so sanh » do sanh
doi cua » dai cua, hoi cua
va dung » van dung, va duong, vat dung
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
ly nang » ky nang, ly hang, ly vang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ((ly nang) or (ty xang)) xa hoi. ((hieu ve) or (hieu van)) cam tuc va dung doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((ly nang) OR (ty xang)) xa hoi. ((hieu ve) OR (hieu van)) cam tuc va dung doi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh ((ly nang) or (ty xang)) xa hoi. ((hieu ve) or (hieu van)) cam tuc va dung doi cua tre*.