Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thue hoc de snippets" » "thu hoc de snippets", "thue khac de snippets", "thue thuc de snippets", "thue hoc he snippets", "thue hoc te snippets", "thue hoc do 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: (((("thue hoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thue hoc de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thue hoc de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thue hoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.