Perhaps you should try some spelling variations:
khoa thuoc » khong thuoc, khoa hoc, nha thuoc
khoa toc » khoa hoc, hoa toc, khoa quoc
hieu chi » hieu cac, hieu moi
nhung bo » nhung bi, nhung bai, nhung don
tu bach » vu bach, tu cach, tu bac
chi cua » chi cuc, khi cua, cuoi cua
bo hoc » bao hoc, bot hoc, co 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: tu bach ((khoa toc) OR (khoa thuoc)) hieu chi cua ets : nhung bo hoc vi đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bach ((khoa toc) OR (khoa thuoc)) hieu chi cua ets : nhung bo hoc vi đai".
• Adding a wildcard symbol may retrieve word variants: tu bach ((khoa toc) OR (khoa thuoc)) hieu chi cua ets : nhung bo hoc vi đai*.