Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc nghe det snippets" » "hoc nghien det snippets", "khoe nghe det snippets", "hoc he det snippets", "hoc nghe dien snippets", "hoc nghe viet snippets", "hoc nghe dan 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: (((("hoc nghe det snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc nghe det snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc nghe det snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc nghe det snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.