Perhaps you should try some spelling variations:
"coders using arduino process problem" » "coders using arduino problemas problem" (Expand search), "coders using arduino process promoted" (Expand search), "coders using bruno process problem" (Expand search), "codes using arduino process problem" (Expand search), "code using arduino process problem" (Expand search), "towers using arduino process problem" (Expand search)
"api pitons python python programming" » "api pitons pythons python programming" (Expand search), "api pitons piton python programming" (Expand search), "api pitons pytm python programming" (Expand search), "api citons python python programming" (Expand search), "api pitoni python python programming" (Expand search), "api pitoes 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: "((\"coders using arduino process problem\") OR (\"api pitons python python programming\"))~".
• Removing quotes may allow a broader search: (( coders using arduino process problem ) OR ( api pitons python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coders using arduino process problem") OR ("api pitons python python programming"))*.