Perhaps you should try some spelling variations:
"coder decoder using logarithmic function" » "coder decoder in logarithmic function" (Expand search), "coder decoder using algorithmic function" (Expand search), "coder decoder and logarithmic function" (Expand search), "encoder decoder using logarithmic function" (Expand search), "coder disorder using logarithmic function" (Expand search), "coder decoding using logarithmic function" (Expand search), "coder cover using logarithmic function" (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 decoder using logarithmic function") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder using logarithmic function\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder using logarithmic function ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder using logarithmic function") OR ("_ python python python programming"))*.