Perhaps you should try some spelling variations:
"toc phieu phan snippets" » "toc lieu phan snippets", "toc hieu pham snippets", "toc hieu phap snippets", "toc thieu phan snippets", "doc hieu phan snippets", "hoc thieu phan snippets", "toc phieu phan slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("dung va java snippets") or ("toc phieu phan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("toc phieu phan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( toc phieu phan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("toc phieu phan snippets"))) or ("locating bug code snippets"))*.