Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den lang phi slippers" » "den nang phi slippers", "den bang phi slippers", "ten lang phi slippers", "den lang phu slippers", "den lang chai slippers", "den lang ha slippers", "den lang phi slippery", "den lang phi grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("den lang phi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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