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