Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam van ke snippets" » "nam dan ke snippets", "nam va ke snippets", "pham van ke snippets", "nam van ket snippets", "nam van de snippets", "nam van ky 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 van ke 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 van ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam van ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam van ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.