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