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