Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung doc sach slippers" » "dung doi sach slippers", "dung hoc sach slippers", "dung coc sach slippers", "dung toc sach slippers", "dung nuoc sach slippers", "dung doc sach slippery", "dung doc sach grippers"
"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 doc sach 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 doc sach slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung doc sach slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung doc sach slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.