Perhaps you should try some spelling variations:
"cong vang thinh slippers" » "cong van thinh slippers", "cong hoang thinh slippers", "cong quang thinh slippers", "cong lang thinh slippers", "cong ngang thinh slippers", "cong vang thinh slippery", "cong vang thinh 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: (((("dung java java snippets") or ("cong vang thinh slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong vang thinh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong vang thinh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong vang thinh slippers"))) or ("locating bug code snippets"))*.