Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
mua ban » cua ban, qua ban
cuu tre » cua tre, cau treo
nam mua » nam cua, nam qua, nam xua
va nam » van nam, ha nam, va nay
ma hoi » mai hoi, xa hoi, 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: thu sach ky nang ((ma hoi) or (ma hoa)). hieu va nam mua ban thanh vai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (ma hoa)). hieu va nam mua ban thanh vai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) or (ma hoa)). hieu va nam mua ban thanh vai ((cuu tre) or (cau tren))*.