Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hai thuc » thai thuc, dai thuc, ha thuc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van hai » van ha, van chat, van hanh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
va dao » ca dao
dao vi » dao voi, dao ve, dao va

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 y nang xa hoi. hieu van hai thuc va dao vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van hai thuc va dao vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van hai thuc va dao vi ((cua tre) or (cuu tre))*.