Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe hoi hoc snippets" » "nghe hoa hoc snippets", "nghe noi hoc snippets", "nghe moi hoc snippets", "nghe khoa hoc snippets", "nghe hoi chuc 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 hoi hoc 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 hoi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe hoi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe hoi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.