Perhaps you should try some spelling variations:
"coder coder using optimization problem" » "coder coder using optimization problems" (Expand search), "coder coder time optimization problem" (Expand search), "coder decoder using optimization problem" (Expand search), "code code using optimization problem" (Expand search), "decoder codec using optimization problem" (Expand search), "coder coders using optimization problem" (Expand search), "coder cover using optimization problem" (Expand search), "coder code using 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 using optimization problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder using optimization problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder using optimization problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder using optimization problem") OR ("api python python python programming"))*.