Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam hoc do snippets" » "nam moc do snippets", "nam hoi do snippets", "am hoc do snippets", "nam hoc doi snippets", "nam hoc co snippets", "nam hoc bo 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 hoc do 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 hoc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam hoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam hoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.