Perhaps you should try some spelling variations:
hoc sach » hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, vuc van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
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: ((hoc sach) OR (hoc sinh)) y nang xa hoi. hieu qua cam xuc van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc sinh)) y nang xa hoi. hieu qua cam xuc van hanh vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc sinh)) y nang xa hoi. hieu qua cam xuc van hanh vi ((cua tre) or (cuu tre))*".