Perhaps you should try some spelling variations:
"cong suat trac slippers" » "nang suat trac slippers", "cong san trac slippers", "cong cua trac slippers", "cong suat truoc slippers", "cong sat trach slippers", "cong suat thap slippers", "cong suat trac slippery", "cong suat trac grippers"
"dung java java snippets" » "dung va java snippets"
"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 suat 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 suat trac slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong suat trac slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong suat trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.