Perhaps you should try some spelling variations:
khoa thuoc » khong thuoc, khoa hoc, nha thuoc
khoa toc » khoa hoc, hoa toc, khoa quoc
tien chi » trien chi, tien khi, kien chi
nhung gi » nhung bi, nhung bai
tu sach » thu sach, su sach, te sach
chi cua » chi cuc, khi cua, cuoi cua
gi doc » giam doc, gian doc
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: tu sach ((khoa toc) OR (khoa thuoc)) tien chi cua ets : nhung gi doc va đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((khoa toc) OR (khoa thuoc)) tien chi cua ets : nhung gi doc va đai".
• Adding a wildcard symbol may retrieve word variants: tu sach ((khoa toc) OR (khoa thuoc)) tien chi cua ets : nhung gi doc va đai*.