Perhaps you should try some spelling variations:
"dung xuan liu slippers" » "duong xuan liu slippers", "dung luan liu slippers", "dung quan liu slippers", "dung juan liu slippers", "dung xuan liem slippers", "dung xuan kieu slippers", "dung xuan liu slippery", "dung xuan liu 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 xuan liu 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 xuan liu slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung xuan liu slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung xuan liu slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.