Perhaps you should try some spelling variations:
nganh dieu » nganh dien, nhan dieu, gan dieu
van nganh » van ngan, va nganh, vien nganh
dieu cua » dieu tra
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, lang van
luc van » luoc van, luu van, duc van
te sac » te sach, te cac, te san
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
ve cam » ve cham, va cam, ve cai

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 sac ky ((lang xa) OR (dang xay)) hoi. hieu ((ve cam) OR (ve cac)) luc van nganh dieu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((lang xa) or (dang xay)) hoi. hieu ((ve cam) OR (ve cac)) luc van nganh dieu cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((lang xa) or (dang xay)) hoi. hieu ((ve cam) OR (ve cac)) luc van nganh dieu cua tre*.