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
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, me hoi
va nam » van nam, ha nam
va nay » va ngay, va cay

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 (ma hoa)). hieu ((va nam) OR (va nay)) dia 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 (ma hoa)). hieu ((va nam) OR (va nay)) dia ban thanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((ma hoi) or (ma hoa)). hieu ((va nam) OR (va nay)) dia ban thanh vai cuu tre*".