Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam xa dong snippets" » "nam ha dong snippets", "nam van dong snippets", "nam lao dong snippets", "nam xua dong snippets", "nam a dong snippets", "nam va dong 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 xa dong 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 xa dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam xa dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam xa dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.