Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
truc va » thuc vat, trung va
cuu tre » cua tre, cau tren
thuc va » thuc vat, thuc dan, thuc day
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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: su sac ky nang xa hoi. hieu van cac ((truc va) OR (thuc va)) hanh vi ((cuu tre) OR (cau treo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. hieu van cac ((truc va) or (thuc va)) hanh vi ((cuu tre) OR (cau treo))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. hieu van cac ((truc va) or (thuc va)) hanh vi ((cuu tre) OR (cau treo))*.