Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, me hoi, va hoi
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang ((((ma hoi) or (xa hoi))) or (ma hoa)). hieu va nam cua ban thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((((ma hoi) OR (xa hoi))) OR (ma hoa)). hieu va nam cua ban thanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((((ma hoi) or (xa hoi))) or (ma hoa)). hieu va nam cua ban thanh vai cuu tre*.