Perhaps you should try some spelling variations:
"dung quang liu slippers" » "dang quang liu slippers", "luong quang liu slippers", "dung luan liu slippers", "dung quang lien slippers", "dung quang dieu slippers", "dung quang linh slippers", "dung quang liu slippery", "dung quang 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 quang 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 quang liu slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung quang liu slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung quang liu slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.