Perhaps you should try some spelling variations:
dang xay » dang van, van xay
te sach » toc sach
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
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
tuc va » thuc va, truc va, tuc xa

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 di) OR (hanh de)) 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 di) OR (hanh de)) 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 di) OR (hanh de)) cua tre*.