Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi duc tan slippers" » "pham duc tan slippers", "phan duc tan slippers", "chi duoc tan slippers", "phi duc tran slippers", "phi duc toan slippers", "phi duc than slippers", "phi duc tan slippery", "phi duc tan 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: (((("phi duc tan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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