Perhaps you should try some spelling variations:
"dung sanh dan slippers" » "dung san dan slippers", "dung danh dan slippers", "dung sach dan slippers", "dung canh dan slippers", "dung sach danh slippers", "dung sinh danh slippers", "dung sanh dan slippery", "dung sanh 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 sanh 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 sanh dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung sanh dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung sanh dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.