Perhaps you should try some spelling variations:
"coder coding using effort sampling" » "coder coding using short sampling" (Expand search), "modern coding using effort sampling" (Expand search), "color coding using effort sampling" (Expand search), "odor coding using effort sampling" (Expand search), "coder modeling using effort sampling" (Expand search), "coder drying using effort sampling" (Expand search), "coder coding during effort sampling" (Expand search), "coder coding fishing effort sampling" (Expand search), "coder coding testing effort sampling" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python 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 coding using effort sampling") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding using effort sampling\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding using effort sampling ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding using effort sampling") OR ("_ python python python programming"))*.