Perhaps you should try some spelling variations:
"code code use rostering problem" » "code code use clustering problem" (Expand search), "code code use routing problem" (Expand search), "code code use covering problem" (Expand search), "code code nurse rostering problem" (Expand search), "code code bus rostering problem" (Expand search), "code code crew rostering problem" (Expand search), "code cdc use rostering problem" (Expand search), "code code reuse rostering problem" (Expand search), "code codes used rostering 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), "manim python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"code code use rostering problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( code code use rostering problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("code code use rostering problem") OR ("api python python python programming"))*.