Perhaps you should try some spelling variations:
"war / economical aspects" » "war / economic aspects", "war / ecological aspects", "war / biological aspects"
"war / economic prospects" » "war / economic aspects", "war / economic perspectives", "war / economic perspective"

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: (("war / economical aspects") OR ("war / economic prospects")).
• Removing quotes may allow a broader search: (( war / economical aspects ) or ( war / economic prospects )).
• Adding a wildcard symbol may retrieve word variants: (("war / economical aspects") or ("war / economic prospects"))*.