Perhaps you should try some spelling variations:
persistence problem » persistence problems (Expand search), persistente problema (Expand search), resistance problem (Expand search)
java persistence » data persistence (Expand search), and persistence (Expand search), local persistence (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder coder » coder decoder (Expand search), code code (Expand search), decoder codec (Expand search)
coder java » codes java (Expand search), xcode java (Expand search)
api python » rpa python (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coder coder java persistence problem ) OR ( api python python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder coder java persistence problem ) OR ( api python python python programming ))*.