Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam theo doi snippets" » "nam thuoc doi snippets", "pham theo doi snippets", "kem theo doi snippets", "nam theo duoi snippets", "nam theo don snippets", "nam theo 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 theo doi 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 theo doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam theo doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam theo doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.