Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam thanh de snippets" » "pham thanh de snippets", "ban thanh de snippets", "tai thanh de snippets", "nam hanh de snippets", "nam thanh ve snippets", "nam thanh do 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 thanh de 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 thanh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam thanh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam thanh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.