Perhaps you should try some spelling variations:
"dung toan van slippers" » "dung doanh van slippers", "dung thang van slippers", "dung thanh van slippers", "dung tran van slippers", "dung toan ban slippers", "dung tan van slippers", "dung toan van slippery", "dung toan van 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 toan van 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 toan van slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung toan van slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung toan van slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.