Perhaps you should try some spelling variations:
"amateur paediatric association" » "amateur psychiatric association", "amateur paediatric addiction"
"amateur sympatric association" » "amateur symmetric association", "amateur symmetric associations", "amateur sympatric speciation"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"amateur paediatric association\") OR (\"amateur sympatric association\"))".
• Removing quotes may allow a broader search: (( amateur paediatric association ) OR ( amateur sympatric association )).
• Adding a wildcard symbol may retrieve word variants: (("amateur paediatric association") OR ("amateur sympatric association"))*.