Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam trac hoc snippets" » "nam tra hoc snippets", "nam truc hoc snippets", "nam truoc hoc snippets", "nam toan hoc snippets", "nam thai hoc snippets", "nam toc hoc 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 trac hoc 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 trac hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam trac hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam trac hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.