Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
nam dua » nam da, nam cua, nam mua
dua ban » dia ban, cua ban, qua ban
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
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: thu ((sach ky) or (sac ky)) nang ((xa hoi) or (ma hoa)). hieu va nam dua ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang ((xa hoi) OR (ma hoa)). hieu va nam dua ban thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang ((xa hoi) or (ma hoa)). hieu va nam dua ban thanh vai cua tre*.