Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"den ban anh snippets" » "dien ban anh snippets", "den bang anh snippets", "dep ban anh snippets", "den ban hanh snippets", "den ban banh snippets", "den ban danh snippets", "den ban 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: (((("den ban anh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den ban anh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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