Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"van mai dung snippets" » "van mai hung snippets", "van mai huong snippets", "van manh dung snippets", "van hai dung snippets", "van ai dung snippets", "ban mai dung snippets", "van mai dung 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: (((("van mai dung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van mai dung snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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