Perhaps you should try some spelling variations:
canada research » canadian research, canola research, can research
research claire » research care, research claip, research chapitre
research clara » research class, research care, research carla

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: (((( canada research claire ) OR ( canada research clara ))) OR ( cancer research claire )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( canada research claire ) OR ( canada research clara ))) or ( cancer research claire ))".
• Adding a wildcard symbol may retrieve word variants: (((( canada research claire ) OR ( canada research clara ))) or ( cancer research claire ))*.