Perhaps you should try some spelling variations:
"coder coder complexity esl programming" » "coder code complexity esl programming" (Expand search), "coder model complexity esl programming" (Expand search), "coder lower complexity esl programming" (Expand search), "coder coder complexity cell programming" (Expand search), "coder coder complexity perl programming" (Expand search), "coder coder complexity end programming" (Expand search), "coder coder complexity ec programming" (Expand search), "coder coder complexity all programming" (Expand search), "coder coder complexity dsp programming" (Expand search), "coder decoder complexity esl programming" (Expand search), "code code complexity esl programming" (Expand search), "decoder codec complexity esl programming" (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 complexity esl programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder complexity esl programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder complexity esl programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder complexity esl programming") OR ("on python python python programming"))*.