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