Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van thao cao snippets" » "van tham cao snippets", "van hao cao snippets", "van than cao snippets", "van tao cao snippets", "van thai cao snippets", "van thao dao 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: (((("dung java java snippets") or ("van thao cao snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van thao cao snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van thao cao snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van thao cao snippets"))) or ("locating bug code snippets"))*.