Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"chu viet san snippets" » "che viet san snippets", "khau viet san snippets", "su viet san snippets", "chu viet van snippets", "chu viet han snippets", "chu viet man snippets", "chu viet san 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: (((("chu viet san snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chu viet san snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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