Perhaps you should try some spelling variations:
"cong cong coc snippets" » "cong dong coc snippets", "trong cong coc snippets", "dung cong coc snippets", "cong cong cuoc snippets", "cong cong cac snippets", "cong cong co snippets"
"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 cong coc 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 cong coc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cong coc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cong coc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.