Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, cach thuc
sach tham » sach nha
hanh van » thanh van, khanh van, hanh va
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc 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: thuoc ((sach thue) or (sach tham)) nang x hoi. hieu va cam luc va ((hanh van) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach thue) OR (sach tham)) nang x hoi. hieu va cam luc va ((hanh van) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach thue) or (sach tham)) nang x hoi. hieu va cam luc va ((hanh van) or (hanh vi)) cua tre*.