Perhaps you should try some spelling variations:
thuoc thieu » toc thieu, hoc thieu, thuc hieu
khoa thuoc » khong thuoc, khoa hoc, nha thuoc
thieu chi » thieu nhi, hieu chi, tieu chi
nhung bi » nhung bai, nhung gi
nhung bo » nhung bai, nhung don, trung bo
tu sach » thu sach, te sach, tu cach
chi cua » chi cuc, khi cua, cuoi cua
su sach » so sach, vu sach
uoc li » duoc li, hoc li, uoc lien

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) or (su sach)) khoa thuoc thieu chi cua ets : ((nhung bo) OR (nhung bi)) uoc li đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) khoa thuoc thieu chi cua ets : ((nhung bo) OR (nhung bi)) uoc li đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) khoa thuoc thieu chi cua ets : ((nhung bo) OR (nhung bi)) uoc li đai".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) khoa thuoc thieu chi cua ets : ((nhung bo) OR (nhung bi)) uoc li đai*.