Perhaps you should try some spelling variations:
kien nghi » kien chi, biet nghi, kien noi
nha thuoc » nha nuoc, nhan thuc
nghi cua » nghia cua, nghe cua, ngai cua
nhung bo » nhung bi, nhung don, trung bo
su sach » so sach, vu sach
nha hoc » khoa hoc, nha nuoc, thai hoc
doc vi » hoc vi, don vi, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((nha thuoc) or (nha hoc)) kien nghi cua ets : ((nhung bo) OR (nhung bai)) doc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((nha thuoc) OR (nha hoc)) kien nghi cua ets : ((nhung bo) OR (nhung bai)) doc vi đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((nha thuoc) or (nha hoc)) kien nghi cua ets : ((nhung bo) OR (nhung bai)) doc vi đai".
• Adding a wildcard symbol may retrieve word variants: su sach ((nha thuoc) or (nha hoc)) kien nghi cua ets : ((nhung bo) OR (nhung bai)) doc vi đai*.