Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
van vat » van chat, nhan vat
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
den va » dien va, den vai, den vay

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 ty nang xa hoi. hieu va cac ((xuc va) or (luc va)) ((den va) or (van vat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu va cac ((xuc va) OR (luc va)) ((den va) OR (van vat)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu va cac ((xuc va) or (luc va)) ((den va) or (van vat)) cua tre*.