Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat theo so snippets" » "nhat nheo so snippets", "pham theo so snippets", "nam theo so snippets", "nhat theo bo snippets", "nhat theo doi snippets", "nhat theo don 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: (((("nhat theo so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat theo so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("nhat theo so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.