Perhaps you should try some spelling variations:
sach bao » sach dao, sach bai, sach bac
bao nano » tao nano, bao cao, cao nang
nano cau » nang cau, bang cau, nano va
ban hanh » ban hang
dua tren » dung tren
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach bao nano cau hoi. hieu va cam xuc ban hanh va ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach bao nano cau hoi. hieu va cam xuc ban hanh va ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach bao nano cau hoi. hieu va cam xuc ban hanh va ((dua tren) or (cuu tre))*.