Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
sach ky » sac ky, sach y, sach ty
dang xa » lang xa, dang ha, dang va
tai cua » thai cua, tai cuc, tri cua
nam tu » nam thu, nam thuc
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky ((dang xa) OR (dang xay)) hoi. hieu van nam tu ((ban thanh) or (van hanh)) tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky ((dang xa) OR (dang xay)) hoi. hieu van nam tu ((ban thanh) OR (van hanh)) tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky ((dang xa) OR (dang xay)) hoi. hieu van nam tu ((ban thanh) or (van hanh)) tai cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((dang xa) OR (dang xay)) hoi. hieu van nam tu ((ban thanh) or (van hanh)) tai cua te*.