Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phac so hoc snippets" » "phap so hoc snippets", "phac do hoc snippets", "khac son hoc snippets", "phac co hoc snippets", "phac mo hoc snippets", "phac so hoa snippets"
"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: (((("python using java snippets") or ("phac so hoc snippets"))) or ("locating bug code snippets"))~.
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