Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
toc sach » hoc sach, doc sach, thuoc sach
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cua te » cua tu
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
du va » dau va, su va, vu va

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: toc sach ky tang ma hoi. hieu ve cac ((du va) OR (tu va)) thanh dat ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky tang ma hoi. hieu ve cac ((du va) OR (tu va)) thanh dat ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: toc sach ky tang ma hoi. hieu ve cac ((du va) OR (tu va)) thanh dat ((cua tre) or (cua te))*.