Perhaps you should try some spelling variations:
based incentives » market incentives, based initiatives
incentives ripe » incentives drive, incentives die, incentives regime
ripe studies » case studies, ripe series
code act » code a, code c, code mac
code ist » code pt
code ctu » code c, code pt

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial ((((code act) or (code ist))) or (code ctu)) based incentives ripe studies.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: commercial ((((code act) OR (code ist))) OR (code ctu)) based incentives ripe studies..
• Adding a wildcard symbol may retrieve word variants: commercial ((((code act) or (code ist))) or (code ctu)) based incentives ripe studies.*.