Perhaps you should try some spelling variations:
"tong cong doi snippets" » "trong cong doi snippets", "cong cong doi snippets", "dung cong doi snippets", "tong vong doi snippets", "tong cong dot snippets", "tong cong goi 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: (((("tong cong doi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong cong doi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tong cong doi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong cong doi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.