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