Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"dan thu anh snippets" » "dan thuc anh snippets", "dan thue anh snippets", "dang thu anh snippets", "dan thuy anh snippets", "dan thu canh snippets", "dan thu oanh snippets", "dan thu anh slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("dan thu anh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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