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