Perhaps you should try some spelling variations:
dohang khoa » doanh khoa, dong khoa, dang khoa
hang khoa » dung khoa
hoc thieu » toc thieu, hoc hien
nhung don » nhung van, nhung bo
trung bo » truong bo, trung hoc, trung hoa
nhi cua » nghi cua, chi cua, khi cua
oc vi » hoc vi, doc vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hang khoa) or (dohang khoa)) hoc thieu nhi cua ets : ((trung bo) or (nhung don)) oc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hang khoa) OR (dohang khoa)) hoc thieu nhi cua ets : ((trung bo) OR (nhung don)) oc vi đai.
• Adding a wildcard symbol may retrieve word variants: toc ((hang khoa) or (dohang khoa)) hoc thieu nhi cua ets : ((trung bo) or (nhung don)) oc vi đai*.