Perhaps you should try some spelling variations:
dang xay » dang van, van xay
te sach » toc sach
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cac tuc » cac toc, cac tu, cac tac
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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: te sach ty ((nang xa) OR (dang xay)) hoi. hieu va cac tuc ((va hanh) OR (va danh)) di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (dang xay)) hoi. hieu va cac tuc ((va hanh) OR (va danh)) di cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (dang xay)) hoi. hieu va cac tuc ((va hanh) OR (va danh)) di cua tre*.