Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cau theo » cau thi, cau tao
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va
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 ky nang x hoi. hieu van cam xuc va hanh vi ((cua tre) or (((cuu tre) or (cau theo))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ky nang x hoi. hieu van cam xuc va hanh vi ((cua tre) OR (((cuu tre) OR (cau theo)))).
• Adding a wildcard symbol may retrieve word variants: co sach ky nang x hoi. hieu van cam xuc va hanh vi ((cua tre) or (((cuu tre) or (cau theo))))*.