Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong tu dat slippers" » "cong ty dat slippers", "cong cu dat slippers", "dong tu dat slippers", "cong tu bat slippers", "cong tu dat slippery", "cong tu dat 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 tu dat 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 tu dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tu dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tu dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.