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