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