Perhaps you should try some spelling variations:
"coder fragmentation functions scheduling problem" » "coder fragmentation operations scheduling problem" (Expand search), "coder fragmentation functions stirling problem" (Expand search), "coder fragmentation rotation scheduling problem" (Expand search), "cover fragmentation functions scheduling problem" (Expand search), "power fragmentation functions scheduling problem" (Expand search), "core fragmentation functions scheduling 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 fragmentation functions scheduling problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder fragmentation functions scheduling problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder fragmentation functions scheduling problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder fragmentation functions scheduling problem") OR ("api python python python programming"))*.