Perhaps you should try some spelling variations:
"dung nhan co snippets" » "dung luan co snippets", "dung nhan con snippets", "dung phan co snippets", "dung nhan mo snippets"
"dung cac trinh snippets" » "dung cac tinh snippets", "dung lap trinh snippets", "dung cac thanh snippets", "luong cac trinh snippets", "dung cho trinh snippets", "dung tai trinh 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: (((("dung nhan co snippets") or ("dung cac trinh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nhan co snippets") OR ("dung cac trinh snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung nhan co snippets ) or ( dung cac trinh snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung nhan co snippets") or ("dung cac trinh snippets"))) or ("locating bug code snippets"))*.