Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
kinh dai » sinh dai, kinh dao, kinh hai
nang xa » nang x, lang xa, nang ma
chao tu » cho tu, cao tu, chai tu
va kinh » va tinh, qua kinh
cua tre » cua te, cuu tre, cua triet
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 ((chao tu) OR (chao xu)) va kinh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu van ((chao tu) OR (chao xu)) va kinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu van ((chao tu) OR (chao xu)) va kinh dai cua tre*.