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