Perhaps you should try some spelling variations:
pol » poly, pole, poll
polls » polyls, polels, pollls, poll, pools, poles
polyion » polyyion, poleyion, pollyion, polyanion, polyionic
pool » poor
hole » home, hope, holy

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: (((pol OR pool) OR pope) OR ((polls OR polyion) OR hole)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((pol OR pool) or pope) or ((polls or polyion) or hole))".
• Adding a wildcard symbol may retrieve word variants: (((pol OR pool) or pope) or ((polls or polyion) or hole))*.