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