Perhaps you should try some spelling variations:
biet nghia » viet nghin
biet nghi » biet nguoi, viet nghin, biet noi
nhung bo » nhung bi, nhung bai, nhung don
su sach » so sach
vu sach » vu bach, vu khach
bo doi » bo di, bo noi, co doi
doi vi » doi voi, doi vai, doi va
nha » nhan, nhat

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: ((su sach) OR (vu sach)) nha nuoc ((biet nghia) OR (biet nghi)) duy ets : nhung bo doi vi đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) nha nuoc ((biet nghia) OR (biet nghi)) duy ets : nhung bo doi vi đai~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) nha nuoc ((biet nghia) OR (biet nghi)) duy ets : nhung bo doi vi đai*.