Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh duc » minh duc, ninh duc, tinh duc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
duc cuu » duc suu
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
luc va » duc va, tuc va
loc va » hoc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang xa hoi. hieu va cao ((luc va) or (loc va)) dinh duc cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu va cao ((luc va) OR (loc va)) dinh duc cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu va cao ((luc va) or (loc va)) dinh duc cuu tre*.