Perhaps you should try some spelling variations:
functional study » functional studies (Expand search), sectional study (Expand search), national study (Expand search)
ctn functional » can functional (Expand search), on functional (Expand search), in functional (Expand search)
study decrease » stent decrease (Expand search), study disease (Expand search), study degree (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
code ctn » code an (Expand search), code cpc (Expand search)

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

• Removing quotes may allow a broader search: (( code ctn functional study decrease ) OR ( _ python python python programming ))~.