Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vin » hanh tin, hanh van, thanh vien
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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 y nang xa hoi. lieu ((va cam) or (va cao)) duc van ((hanh vin) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang xa hoi. lieu ((va cam) OR (va cao)) duc van ((hanh vin) OR (hanh vi)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang xa hoi. lieu ((va cam) or (va cao)) duc van ((hanh vin) or (hanh vi)) cuu tre*.