Perhaps you should try some spelling variations:
"coder using arduino optics problem" » "coder using arduino robotics problem" (Expand search), "coder using arduino robotica problem" (Expand search), "coder using arduino matrices problem" (Expand search), "coder using arduino optimal problem" (Expand search), "coders using arduino optics problem" (Expand search), "cover using arduino optics problem" (Expand search), "code using arduino optics problem" (Expand search)
"api piton python python programming" » "api piton pythons python programming" (Expand search), "api piton pitons python programming" (Expand search), "api piton pytm python programming" (Expand search), "api pitons python python programming" (Expand search), "api in python python programming" (Expand search), "api with python python programming" (Expand search), "api 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 using arduino optics problem\") OR (\"api piton python python programming\"))~".
• Removing quotes may allow a broader search: (( coder using arduino optics problem ) OR ( api piton python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder using arduino optics problem") OR ("api piton python python programming"))*.