Perhaps you should try some spelling variations:
sanh khoa » anh khoa, san khoa, sinh khoa
hoc thieu » toc thieu, hoc hien
thieu khi » thieu nhi, tien khi, hieu chi
khoa hoc » hoa hoc
nhung bi » nhung bai, nhung gi
so sanh » do sanh
khi cua » chi cua, thai cua
doc vi » hoc vi, don vi, doc viet
doc va » duoc va, duc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh khoa hoc thieu khi cua ets : nhung bi ((doc vi) or (((doc va) OR (hoc va)))) đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh khoa hoc thieu khi cua ets : nhung bi ((doc vi) OR (((doc va) OR (hoc va)))) đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh khoa hoc thieu khi cua ets : nhung bi ((doc vi) or (((doc va) OR (hoc va)))) đai".
• Adding a wildcard symbol may retrieve word variants: so sanh khoa hoc thieu khi cua ets : nhung bi ((doc vi) or (((doc va) OR (hoc va)))) đai*.