Perhaps you should try some spelling variations:
authorization authentication » information authentication
authentication over » authentication codes, authentication model, authentication code
over decisions » user decisions, prover decision, other decision
david weaver » david weliver, david wheeler, david silver
david walker » david parker, dandy walker, david warren
david every » david jeffery, david favero

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

• Performing a fuzzy search may retrieve terms with similar spellings: authorization authentication over decisions ((david every) or (((david weaver) or (david walker))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: authorization authentication over decisions ((david every) OR (((david weaver) OR (david walker)))).
• Adding a wildcard symbol may retrieve word variants: authorization authentication over decisions ((david every) or (((david weaver) or (david walker))))*.