Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam hon don snippets" » "nam chon don snippets", "tam hon don snippets", "nam hoi don snippets", "nam hoa don snippets", "nam hon loan snippets", "nam hong son 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 hon don 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 hon don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam hon don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam hon don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.