Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
chat xuc » chat huu, cam xuc, chat cua
va danh » va dinh, va dan, dia danh
dau cua » dai cua, day cua, cau cua
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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

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