Perhaps you should try some spelling variations:
"coder coder teaching online problems" » "coder coder learning online problems" (Expand search), "coder coder teaching online problemas" (Expand search), "coder coder teaching online problem" (Expand search), "coder coder teaching line problems" (Expand search), "coder code teaching online problems" (Expand search), "coder poder teaching online problems" (Expand search), "coder model teaching online problems" (Expand search), "coder decoder teaching online problems" (Expand search), "code code teaching online problems" (Expand search), "decoder codec teaching online problems" (Expand search)
"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)

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 teaching online problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder teaching online problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder teaching online problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder teaching online problems") OR ("on python python python programming"))*.