Perhaps you should try some spelling variations:
poli » poly, pole, poll, pooli, polyi, polei
pol » pool, poly, pole
polyelen » poolyelen, polyyelen, poleyelen, polyenen, polyolen, polyedern
poleyolen » pooleyolen, polyeyolen, poleeyolen, polyolen, polyole
polyenes » poolyenes, polyyenes, poleyenes
polyeder » poolyeder, polyyeder, poleyeder, polyester
roles » role, rules

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: (((poli OR pol) OR ((polyelen OR poleyolen) OR post)) OR ((polyenes OR polyeder) OR roles)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((poli or pol) or ((polyelen or poleyolen) or post)) or ((polyenes OR polyeder) or roles))".
• Adding a wildcard symbol may retrieve word variants: (((poli or pol) or ((polyelen or poleyolen) or post)) or ((polyenes OR polyeder) or roles))*.