Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu vi » hieu voi, hieu va, hieu ve
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu
pham » phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach y nang xa hoi. hieu vi pham duc ((va danh) or (va hanh)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach y nang xa hoi. hieu vi pham duc ((va danh) OR (va hanh)) vai cua tu.
• Adding a wildcard symbol may retrieve word variants: co sach y nang xa hoi. hieu vi pham duc ((va danh) or (va hanh)) vai cua tu*.