Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
cuu tre » cau tren, cau treo
nang xa » nang x, lang xa, nang ma
van hac » van hoc, van ha, van hai
thuc va » thuc vat, thuc day
cua tre » cua te, cua triet, dua tren
bach y » sach y
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach y nang xa hoi. hieu van hac ((thuc va) OR (thuc dan)) hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach y nang xa hoi. hieu van hac ((thuc va) OR (thuc dan)) hanh vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach y nang xa hoi. hieu van hac ((thuc va) OR (thuc dan)) hanh vi ((cua tre) or (cuu tre))*".