Perhaps you should try some spelling variations:
"oeconomische gedanken" » "technische gedanken", "soziologische gedanken", "economische gedachtes"
"economische gevolgen" » "okonomische folgen", "economische groei", "economische delicten"
"economic crises" » "economic crisis", "economic costs"

Try widening your search to All Fields.

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: (("economic crises") OR ((("economische gevolgen") OR ("oeconomische gedanken")))).
• Removing quotes may allow a broader search: (( economic crises ) or ((( economische gevolgen ) or ( oeconomische gedanken )))).
• Adding a wildcard symbol may retrieve word variants: (("economic crises") or ((("economische gevolgen") or ("oeconomische gedanken"))))*.