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