Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dang su cac snippets" » "dang tu cac snippets", "dang su cao snippets", "dang su can snippets", "dan su cac snippets", "dong su cac snippets", "nang su cac 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: (((("dang su cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang su cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang su cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang su cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.