Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"thong tin trac slippers" » "thong sinh trac slippers", "thong dien trac slippers", "thong toan trac slippers", "trong tin trac slippers", "thong tin trac slippery", "thong tin 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: (((("thong tin 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: (((("thong tin trac slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong tin trac slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong tin trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.