Perhaps you should try some spelling variations:
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
hanh va » hang va, hanh vi
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) OR (sach tham)) nang x hoi. hieu van cam xuc va ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach tham)) nang x hoi. hieu van cam xuc va ((hanh vai) OR (hanh va)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) OR (sach tham)) nang x hoi. hieu van cam xuc va ((hanh vai) or (hanh va)) cua tre*".