Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duy cong dot snippets" » "duy cuong dot snippets", "duc cong dot snippets", "duy nong dot snippets", "duy cong mot snippets", "duy cong dong snippets", "duy cong doan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duy cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duy cong dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("duy cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.