Perhaps you should try some spelling variations:
"con cong chuc snippets" » "con cong thuc snippets", "con cong cu snippets", "con cong cua snippets", "cong cong chuc snippets", "con cuong chuc snippets", "bon cong chuc 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: (((("con cong chuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("con cong chuc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con cong chuc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con cong chuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.