Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ban hang » ngan hang
hai cuu » hai cua, hai chu, hai cuc
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ((ma hoi) or (mai hoi)). hieu va cam xuc ((ban hang) or (gia thanh)) hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((ma hoi) OR (mai hoi)). hieu va cam xuc ((ban hang) OR (gia thanh)) hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((ma hoi) or (mai hoi)). hieu va cam xuc ((ban hang) or (gia thanh)) hai cuu tre*.