Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam do rong snippets" » "nam do trong snippets", "nam do hong snippets", "nam mo rong snippets", "nam dao rong snippets", "nam doi rong snippets", "nam bo rong 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: (((("nam do rong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam do rong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam do rong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam do rong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.