Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe thuy do snippets" » "nghe thu do snippets", "nghe thuc do snippets", "nghe thuat do snippets", "nghe thuyet do snippets", "nghe thay doi 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 thuy 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: (((("nghe thuy do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe thuy do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe thuy do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.