Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
thanh vi » hanh vi, thanh va, nhanh vi
dang xay » dang van, van xay
van cac » van hac, van cau, van bac
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua te » cua tu

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 ky ((nang xa) OR (dang xay)) hoi. hieu van cac hop va ((thanh vi) OR (thanh ve)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (dang xay)) hoi. hieu van cac hop va ((thanh vi) OR (thanh ve)) cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (dang xay)) hoi. hieu van cac hop va ((thanh vi) OR (thanh ve)) cua te*.