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