Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach ty, sach kem
tang ma » mang may, tang van
van cam » van nam, van lam, van cau
cam cua » ca cua, nam cua, cau cua
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) tang ma hoa. hieu van cam cua ban thanh vai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) tang ma hoa. hieu van cam cua ban thanh vai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) tang ma hoa. hieu van cam cua ban thanh vai ((cua tre) OR (cua te))*.