Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"luan den mau snippets" » "quan den mau snippets", "luan de mau snippets", "luan len mau snippets", "luan dien mao snippets", "luan dang mau snippets", "luan dong mau snippets", "luan den mau 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: (((("luan den mau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan den mau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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