Perhaps you should try some spelling variations:
sanh khoa » anh khoa, san khoa, sinh khoa
hoc thieu » toc thieu, hoc hien
khoa hoc » hoa hoc
thai cua » tai cuc, tri cua, dai cua
than cua » nhan cua, ban cua, gian cua
nhung bi » nhung bai, nhung gi
so sanh » do sanh
khi cua » chi cua
bi doc » bai doc
doc vi » hoc vi, don vi, doc 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) or (thai cua))) or (than cua)) ets : nhung bi doc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh khoa hoc thieu ((((khi cua) OR (thai cua))) OR (than cua)) ets : nhung bi doc vi đai.
• Adding a wildcard symbol may retrieve word variants: so sanh khoa hoc thieu ((((khi cua) or (thai cua))) or (than cua)) ets : nhung bi doc vi đai*.