Perhaps you should try some spelling variations:
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ python programming" (Expand search)
"coder coder robots arduino programmable" » "coder soccer robots arduino programmable" (Expand search), "coder steer robots arduino programmable" (Expand search), "coder decoder robots arduino programmable" (Expand search), "code code robots arduino programmable" (Expand search), "decoder codec robots arduino programmable" (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 coder robots arduino programmable") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder robots arduino programmable\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder robots arduino programmable ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder robots arduino programmable") OR ("on python python python programming"))*.