Perhaps you should try some spelling variations:
carter lectures » carter lecture, after lectures, career lecturer
matter lectures » master's lectures, attend lectures, other lectures
berkeley unix » berkeley usa
unix lectures » union lectures, six lectures, munich lectures

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( berkeley ((carter lectures) OR (matter lectures)) ) OR ( berkeley unix lectures )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( berkeley ((carter lectures) OR (matter lectures)) ) or ( berkeley unix lectures ))".
• Adding a wildcard symbol may retrieve word variants: (( berkeley ((carter lectures) OR (matter lectures)) ) or ( berkeley unix lectures ))*.