Perhaps you should try some spelling variations:
"coder coder design optimization problem" » "coder coder design optimization problems" (Expand search), "coder cover design optimization problem" (Expand search), "coder code design optimization problem" (Expand search), "coder codes design optimization problem" (Expand search), "coder decoder design optimization problem" (Expand search), "code code design optimization problem" (Expand search), "decoder codec design optimization problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder design optimization problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder design optimization problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder design optimization problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder design optimization problem") OR ("api python python python programming"))*.