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