Perhaps you should try some spelling variations:
thuoc biet » thuoc viet, thuoc kiem, thuoc bat
nha thuoc » nha nuoc, nhan thuc, nha hoc
biet nghi » biet nguoi, viet nghin, biet noi
nghi cua » nghia cua, nghe cua, ngai cua
su sach » vu sach
so sach » so sanh, bo sach, co sach
bai hoc » dai hoc

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 biet nghi cua ets : nhung ((bai doc) OR (bai hoc)) va đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) nha thuoc biet nghi cua ets : nhung ((bai doc) OR (bai hoc)) va đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) nha thuoc biet nghi cua ets : nhung ((bai doc) OR (bai hoc)) va đai".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) nha thuoc biet nghi cua ets : nhung ((bai doc) OR (bai hoc)) va đai*.