Perhaps you should try some spelling variations:
"coder using arduino convex programming" » "coder using arduino cone programming" (Expand search), "coder using arduino computer programming" (Expand search), "coders using arduino convex programming" (Expand search), "cover using arduino convex programming" (Expand search), "code using arduino convex programming" (Expand search)
"python codigo python python programming" » "python coding python python programming" (Expand search), "python code python python programming" (Expand search), "python codigo pythons python programming" (Expand search), "python codigo piton python programming" (Expand search), "python codigo pitons 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 using arduino convex programming") OR ("python codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder using arduino convex programming\") OR (\"python codigo python python programming\"))".
• Removing quotes may allow a broader search: (( coder using arduino convex programming ) OR ( python codigo python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder using arduino convex programming") OR ("python codigo python python programming"))*.