Perhaps you should try some spelling variations:
"coder coding convex functions problems" » "coder coding convex functional problems" (Expand search), "coder coding convex fractional problems" (Expand search), "coder coding convex conditions problems" (Expand search), "coder coding over functions problems" (Expand search), "coder using convex functions problems" (Expand search), "coder encoding context functions problems" (Expand search), "modern coding convex functions problems" (Expand search), "color coding convex functions problems" (Expand search), "odor coding convex functions 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)

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: "((\"coder coding convex functions problems\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding convex functions problems ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding convex functions problems") OR ("api python python python programming"))*.