Perhaps you should try some spelling variations:
"dung luan code slippers" » "dung luan cong slippers", "dung luan che slippers", "dung luan de slippers"
"dung cong dat snippets" » "dung trong dat snippets", "dung dong dat snippets", "dung cong dan snippets", "dung cong da snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 luan code slippers") or ("dung cong dat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luan code slippers") OR ("dung cong dat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung luan code slippers ) or ( dung cong dat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luan code slippers") or ("dung cong dat snippets"))) or ("locating bug code snippets"))*.