Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
hanh day » hanh may, han day, hanh dao
nang xa » nang x, lang xa, nang ma
xa hanh » xa thanh, xa khanh, va hanh
day cua » dai cua
cua tre » cua te, cuu tre, cua triet
cam tu » cam thu, nam tu, dam tu

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 tham nang xa hoi. hieu van ((nam thuc) or (cam tu)) xa hanh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tham nang xa hoi. hieu van ((nam thuc) OR (cam tu)) xa hanh day cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach tham nang xa hoi. hieu van ((nam thuc) or (cam tu)) xa hanh day cua tre*.