Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
van chat » cao chat
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) y nang xa hoi. hieu van chat xuc va danh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang xa hoi. hieu van chat xuc va danh vi ((cua tre) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y nang xa hoi. hieu van chat xuc va danh vi ((cua tre) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y nang xa hoi. hieu van chat xuc va danh vi ((cua tre) or (cua viet))*.