Perhaps you should try some spelling variations:
communication information » communication international, communication education
databases optimizing » catalysis optimizing, analysis optimizing, databases mining
databases optimized » database optimized, databases optimal, databases ptime
information hat » information what, information have, information http
hat dimension » a dimension, tacit dimension, pit dimensions

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication information hat dimension ((databases optimized) or (databases optimizing))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication information hat dimension ((databases optimized) OR (databases optimizing)).
• Adding a wildcard symbol may retrieve word variants: communication information hat dimension ((databases optimized) or (databases optimizing))*.