Perhaps you should try some spelling variations:
chua viet » chuan viet, cua viet, chu viet
cua chua » sua chua, cua chu, cua nhua
dang xay » dang van, van xay
dau cua » dai cua, day cua, cau cua
tu cham » toc cham, thi cham
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
vu cham » va cham, vu kham, qua cham
luc va » duc va, tuc va, loc va
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang xa) or (dang xay)) hoi. hieu ((vu cham) OR (tu cham)) luc va dau cua chua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (dang xay)) hoi. hieu ((vu cham) OR (tu cham)) luc va dau cua chua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (dang xay)) hoi. hieu ((vu cham) OR (tu cham)) luc va dau cua chua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (dang xay)) hoi. hieu ((vu cham) OR (tu cham)) luc va dau cua chua viet*.