Perhaps you should try some spelling variations:
preparation presentations » preparation preservation, preparation preparation, preparations preparations
preparation orientation » preparation optimization, preparation purification, preparation preservation
methods session » methods section
session a » session 2a, session 3a, session 1a
a like » a life, a live, a line

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((preparation orientation) or (preparation presentations)) methods session a like~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((preparation orientation) OR (preparation presentations)) methods session a like.
• Adding a wildcard symbol may retrieve word variants: ((preparation orientation) or (preparation presentations)) methods session a like*.