Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham duc » pham duc, cham soc, pham duy
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de

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. hieu va cham duc va dan di ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang xa hoi. hieu va cham duc va dan di ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang xa hoi. hieu va cham duc va dan di ((cua tre) or (cau treo))*.