Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den lam toan snippets" » "den lam tan snippets", "den lap toan snippets", "den tam toan snippets", "de lam toan snippets", "den cam toan snippets", "den lay toan snippets"
"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 ("den lam toan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("den lam toan snippets"))) OR ("locating bug code snippets")).
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