Perhaps you should try some spelling variations:
implementation based » implementation case, implementation a, implementation _
implementation api » implementation rapid, implementation a, implementation agile
decision problem » decision problems, decision process, decision tables
problem spike » problem space, problem size, problem spills

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

• Performing a fuzzy search may retrieve terms with similar spellings: population ((implementation based) or (implementation api)) decision problem spike~.
• If you are trying to use Boolean operators, they must be ALL CAPS: population ((implementation based) OR (implementation api)) decision problem spike.
• Adding a wildcard symbol may retrieve word variants: population ((implementation based) or (implementation api)) decision problem spike*.