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