Perhaps you should try some spelling variations:
"coder coder text testing problem" » "coder coder text nesting problem" (Expand search), "coder coder text nesting problems" (Expand search), "coder coder text teaching problem" (Expand search), "coder coder tilt testing problem" (Expand search), "coder coder text setting problem" (Expand search), "coder coder that testing problem" (Expand search), "coder decoder text testing problem" (Expand search), "code code text testing problem" (Expand search), "decoder codec text testing problem" (Expand search), "coder cover text testing problem" (Expand search), "coder modern text testing problem" (Expand search), "coder der text testing problem" (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 text testing problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder text testing problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder text testing problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder text testing problem") OR ("on python python python programming"))*.