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