Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ve cham ((xuc van) or (luc van)) hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach y nang x hoi. hieu ve cham ((xuc van) OR (luc van)) hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: co sach y nang x hoi. hieu ve cham ((xuc van) or (luc van)) hanh vi ((cua tre) or (cuu tre))*.