Perhaps you should try some spelling variations:
nha thuoc » nhan thuc
kien chi » trien chi, khien cho, hieu chi
nhung bo » nhung bi, nhung bai, nhung don
su sach » so sach, vu sach
nha hoc » khoa hoc, thai hoc, nha khoa
chi cua » chi cuc, khi cua, cuoi cua
bo doc » bo duoc, bo doi, bo oc
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 nuoc))) or (nha hoc)) kien chi cua ets : nhung bo doc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((((nha thuoc) OR (nha nuoc))) OR (nha hoc)) kien chi cua ets : nhung bo doc vi đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((((nha thuoc) OR (nha nuoc))) or (nha hoc)) kien chi cua ets : nhung bo doc vi đai".
• Adding a wildcard symbol may retrieve word variants: su sach ((((nha thuoc) OR (nha nuoc))) or (nha hoc)) kien chi cua ets : nhung bo doc vi đai*.