Perhaps you should try some spelling variations:
"coder collection method tree problem" » "coder collection methods tree problem" (Expand search), "coder reflection method tree problem" (Expand search), "coder selection method tree problem" (Expand search), "modern collection method tree problem" (Expand search), "core collection method tree problem" (Expand search), "over collection method tree problem" (Expand search), "coder collection method the problem" (Expand search), "coder collection method three problem" (Expand search), "coder collection method free 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 collection method tree problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder collection method tree problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder collection method tree problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder collection method tree problem") OR ("api python python python programming"))*.