Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sinh dai » sinh thai, si dai, sinh vat
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, duc va

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 va chat ((tuc va) OR (tuc xa)) sinh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu va chat ((tuc va) OR (tuc xa)) sinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu va chat ((tuc va) OR (tuc xa)) sinh dai cua tre*.