Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
thanh le » thinh le, thanh ve, thanh de
sach ky » sac ky, sach y, sach ty
vuc van » duc van, luc van, thuc van
vu kham » vu khanh
vu cham » va cham, tu cham, qua cham
tang ma » tang van
cua tre » cua te, cuu tre, cua triet
le cua » ly cua

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 ((tang ma) OR (mang may)) moi. hieu ((vu cham) or (vu kham)) vuc van thanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((tang ma) OR (mang may)) moi. hieu ((vu cham) OR (vu kham)) vuc van thanh le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((tang ma) OR (mang may)) moi. hieu ((vu cham) or (vu kham)) vuc van thanh le cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((tang ma) OR (mang may)) moi. hieu ((vu cham) or (vu kham)) vuc van thanh le cua tre*.