Perhaps you should try some spelling variations:
sinh khoa » sinh hoc, anh khoa
sinh hoat » sinh hoc, sinh vat
hoc thieu » toc thieu, hoc hien
thieu chi » thieu nhi, hieu chi, tieu chi
nhung bo » nhung bi, nhung bai, nhung don
chi cua » chi cuc, khi cua, cuoi cua
bo o » bo ho, bo oc, bo so
o vi » co vi, so vi, o 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 ((((sinh khoa) OR (sinh hoat))) or (sach nha)) hoc thieu chi cua ets : nhung bo o vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sinh khoa) OR (sinh hoat))) OR (sach nha)) hoc thieu chi cua ets : nhung bo o vi đai*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sinh khoa) OR (sinh hoat))) or (sach nha)) hoc thieu chi cua ets : nhung bo o vi đai*".