Perhaps you should try some spelling variations:
chapter5 research » chapter research, chapter1 research, chapter6 research
research effects » research efforts, research aspects, research projects
online chapter5 » online chapter, online chapters, online chapter9
online eine » online ein, online event
eine search » line search, fine search, file search

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: (( online eine search document ) OR ( online chapter5 research effects ))*.