Perhaps you should try some spelling variations:
"energy saving in data processing contents" » "energy saving in data processing concepts", "energy saving in data processing context", "energy saving in data processing components", "energy having in data processing contents"
"energy saving in data processing concept" » "energy saving in data processing concepts", "energy saving in data process concept", "energy saving in data processing control", "energy having in data processing concept"

Try widening your search to All Fields.

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: "((\"energy saving in data processing contents\") OR (\"energy saving in data processing concept\"))".
• Removing quotes may allow a broader search: (( energy saving in data processing contents ) OR ( energy saving in data processing concept )).
• Adding a wildcard symbol may retrieve word variants: (("energy saving in data processing contents") OR ("energy saving in data processing concept"))*.