Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung may luc slippers" » "dung va luc slippers", "dung tai luc slippers", "mang may luc slippers", "dung may loc slippers", "dung may luc slippery", "dung may luc 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: (((("python using java snippets") or ("dung may luc slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dung may luc slippers"))) OR ("locating bug code snippets")).
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