Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
chong hoc » chung hoc, chong doc, thong hoc
ban thanh » ban hanh, ban hang
sanh hoc » sinh hoc, anh hoc, danh hoc
so sanh » do sanh
hoi ban » hoi dan, hoi bai, doi ban
hoc xa » hoc ma

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 hoc tap, nghien cua cong ((hoc dan) or (hoc pho)) chong hoc xa hoi ban thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh hoc tap, nghien cua cong ((hoc dan) OR (hoc pho)) chong hoc xa hoi ban thanh san.
• Adding a wildcard symbol may retrieve word variants: so sanh hoc tap, nghien cua cong ((hoc dan) or (hoc pho)) chong hoc xa hoi ban thanh san*.