Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung cau sach slippers" » "dung chau sach slippers", "dung cu sach slippers", "dung cac sach slippers", "dung cao sach slippers", "dung hau sach slippers", "dung rau sach slippers", "dung cau sach slippery", "dung cau 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 cau 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 cau sach slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cau sach slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cau sach slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.