Perhaps you should try some spelling variations:
"dung truc dan slippers" » "dung tru dan slippers", "dung thuoc dan slippers", "dung trung dan slippers", "dung thuc dan slippers", "dung tuc dan slippers", "dung truc ban slippers", "dung truc dan slippery", "dung truc dan 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 truc dan 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 truc dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung truc dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung truc dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.