Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tien toc snippets" » "toan tien toc snippets", "van hieu toc snippets", "van tuan toc snippets", "van tien loc snippets", "van trien ton snippets", "van tien te 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: (((("van tien 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: (((("van tien toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tien toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tien toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.