Perhaps you should try some spelling variations:
sach han » sach tham, sach danh, sach nang
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
sach van » sach va, bach van, cach van
dau xua » dau cua, dao xuan, dau luan
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
dau xuc » dau xac, dau nuoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma

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 van) or (sach han)) nang xa hoi. hieu va ((dau xuc) or (dau xua)) ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach van) OR (sach han)) nang xa hoi. hieu va ((dau xuc) OR (dau xua)) ban hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach van) or (sach han)) nang xa hoi. hieu va ((dau xuc) or (dau xua)) ban hanh vai cua tre*.