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