Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
hieu va » lieu va, hieu qua
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
nam da » nam dan, nam a, nam va
da ban » dia ban, dua ban, day ban

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

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