Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu cao » chieu cao, hieu cac, kieu cao
chat xuc » chat huu, cam xuc, chao xu
van dinh » van minh, van dich, xuan dinh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ca » hieu cac, hieu cua, hieu va
va dinh » va kinh, va tinh, vu dinh
cua tre » cua te, cuu tre, cua triet

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 ky nang xa hoi. ((hieu cao) OR (hieu ca)) chat xuc ((va dinh) or (van dinh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. ((hieu cao) OR (hieu ca)) chat xuc ((va dinh) OR (van dinh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. ((hieu cao) OR (hieu ca)) chat xuc ((va dinh) or (van dinh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. ((hieu cao) OR (hieu ca)) chat xuc ((va dinh) or (van dinh)) dai cua tre*.