Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"juan va nghe snippets" » "luan va nghe snippets", "quan va nghe snippets", "juan a nghe snippets", "juan van nghe snippets", "juan ve nghe snippets", "juan va nghi 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: (((("juan va nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("juan va nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( juan va nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("juan va nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.