Perhaps you should try some spelling variations:
"of piston python python programming" » "of piton python python programming" (Expand search), "of pitons python python programming" (Expand search), "of piston pythons python programming" (Expand search), "of piston piton python programming" (Expand search), "of piston pitons python programming" (Expand search), "of pigeon python python programming" (Expand search), "of pistia python python programming" (Expand search), "_ piston python python programming" (Expand search)
"coder coding _ logarithmic function" » "modern coding _ logarithmic function" (Expand search), "color coding _ logarithmic function" (Expand search), "odor coding _ logarithmic function" (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 coding _ logarithmic function") OR ("of piston python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding _ logarithmic function\") OR (\"of piston python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding _ logarithmic function ) OR ( of piston python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding _ logarithmic function") OR ("of piston python python programming"))*.