Perhaps you should try some spelling variations:
nuoc biet » nuoc viet, nguoi biet, duoc bien
quoc viet » nuoc viet, hoc viet, ngoc viet
nhung don » nhung bo
nhung van » phung van, nhung bai, nhung cau
so sach » so sanh, bo sach, co sach
doi vai » doi voi, doi va, doi bai
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: so sach nha ((nuoc biet) OR (quoc viet)) nghia duy ets : ((nhung don) OR (nhung van)) doi vai đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach nha ((nuoc biet) or (quoc viet)) nghia duy ets : ((nhung don) OR (nhung van)) doi vai đai~".
• Adding a wildcard symbol may retrieve word variants: so sach nha ((nuoc biet) or (quoc viet)) nghia duy ets : ((nhung don) OR (nhung van)) doi vai đai*.