Perhaps you should try some spelling variations:
"dung so hoan snippets" » "dung so code snippets", "dung co hoan snippets", "dung mo hoan snippets", "dung cho hoan snippets", "dung so hoa snippets", "dung su hoan snippets", "dung so toan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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 so hoan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dung so hoan snippets"))) OR ("locating bug core snippets")).
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