Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai van toc snippets" » "thai van toc snippets", "ha van toc snippets", "hai tan toc snippets", "hai van hoc snippets", "hai dan toc snippets", "hai van toi 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: (((("hai van 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: (((("hai van toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai van toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai van toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.