Perhaps you should try some spelling variations:
"khanh vinh dat slippers" » "thanh vinh dat slippers", "khanh linh dat slippers", "thanh binh dat slippers", "khanh dinh dat slippers", "khanh chinh dat slippers", "khanh dinh doat slippers", "khanh vinh dat slippery", "khanh vinh dat 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: (((("khanh vinh 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: (((("khanh vinh dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khanh vinh dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh vinh dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.