Perhaps you should try some spelling variations:
"coder coder teaching cases variogram" » "coder coder teaching cross variogram" (Expand search), "coder code teaching cases variogram" (Expand search), "coder poder teaching cases variogram" (Expand search), "coder model teaching cases variogram" (Expand search), "coder coder teaching case variogram" (Expand search), "coder coder teaching care variogram" (Expand search), "coder coder teaching career variogram" (Expand search), "coder decoder teaching cases variogram" (Expand search), "code code teaching cases variogram" (Expand search), "decoder codec teaching cases variogram" (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 cases variogram") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder teaching cases variogram\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder teaching cases variogram ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder teaching cases variogram") OR ("on python python python programming"))*.