Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"phan lan liu snippets" » "phan lap liu snippets", "phan van liu snippets", "phan loai liu snippets", "phan fan liu snippets", "phan lin liu snippets", "phan lan dieu snippets", "phan lan liu 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: (((("phan lan liu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan lan liu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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