Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
thuoc bi » thuoc bo, thuoc tai, thuoc ban
nghe cua » nghiep cua, nghe va, nghe che
su sach » vu sach
so sach » so sanh, bo sach, co sach
bi nghe » bai nghe, li nghe, mi nghe
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) OR (so sach)) nha thuoc bi nghe cua ets : nhung bai doc va đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) nha thuoc bi nghe cua ets : nhung bai doc va đai".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) nha thuoc bi nghe cua ets : nhung bai doc va đai*.