Perhaps you should try some spelling variations:
"cong khai thac snippets" » "cong hai thac snippets", "cong thai thac snippets", "cong khi thac snippets", "cong khai thuc snippets", "cong khai tac snippets", "cong khai khac snippets", "cong khai thac slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 khai thac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong khai thac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong khai thac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong khai thac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.