Perhaps you should try some spelling variations:
khoa thuoc » khong thuoc, khoa hoc, nha thuoc
hieu nghi » thieu nhi, huu nghi, hieu chi
toc sach » hoc sach, doc sach, thuoc sach
khoa toc » khoa hoc, hoa toc, khoa quoc
nghi cua » nghia cua, nghe cua, ngai cua
bai hoc » dai hoc
hoc vi » hoc va, hoc viet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((khoa toc) OR (khoa thuoc)) hieu nghi cua ets : nhung bai hoc vi đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((khoa toc) OR (khoa thuoc)) hieu nghi cua ets : nhung bai hoc vi đai".
• Adding a wildcard symbol may retrieve word variants: toc sach ((khoa toc) OR (khoa thuoc)) hieu nghi cua ets : nhung bai hoc vi đai*.