Perhaps you should try some spelling variations:
"coder decoder closed string problems" » "coder decoder closed string problem" (Expand search), "coder decoder closed sharing problems" (Expand search), "coder decoder closed sorting problems" (Expand search), "coder decoder codec string problems" (Expand search), "encoder decoder closed string problems" (Expand search), "coder decoder closed strings problems" (Expand search), "coder decoder closest string problems" (Expand search), "coder decoder closed springs 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 decoder closed string problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder closed string problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder closed string problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder closed string problems") OR ("api python python python programming"))*.