Perhaps you should try some spelling variations:
"dung tran trong snippets" » "dung gian trong snippets", "dung quan trong snippets", "dung tren trong snippets", "hung tran trong snippets", "dang tran trong snippets"
"dung hung code slippers" » "dung chung code slippers", "dung nhung code slippers", "dung huong code slippers"
"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 hung code slippers") or ("dung tran trong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hung code slippers") OR ("dung tran trong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hung code slippers ) or ( dung tran trong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hung code slippers") or ("dung tran trong snippets"))) or ("locating bug code snippets"))*.