Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong dan trac slippers" » "cong san trac slippers", "cong tan trac slippers", "huong dan trac slippers", "cong dan tra slippers", "cong dang tran slippers", "cong dien trac slippers", "cong dan trac slippery", "cong dan trac 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 java java snippets") or ("cong dan trac slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong dan trac slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong dan trac slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong dan trac slippers"))) or ("locating bug code snippets"))*.