Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nha hoc
nhan thuc » nhan luc, dan thuc, toan thuc
biet nghi » biet nguoi, viet nghin, biet noi
nghi cua » nghia cua, nghe cua, ngai cua
su sach » so sach, vu sach
bai doc » bai hoc
doc va » duoc va, hoc va, duc 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 (nhan thuc)) biet nghi cua ets : nhung bai doc va đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((nha thuoc) OR (nhan thuc)) biet nghi cua ets : nhung bai doc va đai".
• Adding a wildcard symbol may retrieve word variants: su sach ((nha thuoc) OR (nhan thuc)) biet nghi cua ets : nhung bai doc va đai*.