Perhaps you should try some spelling variations:
khoa thuoc » khong thuoc, khoa hoc, nha thuoc
hieu nghia » hieu gia
nghia cua » nghiep cua, nghia xa, nghia duy
toc sach » hoc sach, doc sach, thuoc sach
hoa toc » hoa hoc, ho toc, hoa doc
bai oc » bai hoc, bai doc
oc vi » hoc vi, doc vi

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 ((hoa toc) or (khoa thuoc)) hieu nghia cua ets : nhung bai oc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((hoa toc) OR (khoa thuoc)) hieu nghia cua ets : nhung bai oc vi đai.
• Adding a wildcard symbol may retrieve word variants: toc sach ((hoa toc) or (khoa thuoc)) hieu nghia cua ets : nhung bai oc vi đai*.