Perhaps you should try some spelling variations:
"dung nhan code snippets" » "dung luan code snippets", "dung nhan co snippets", "dung nhan con snippets"
"dung cac cac snippets" » "luong cac cac snippets", "dung cho cac snippets", "dung tai cac snippets", "dung cac cach snippets", "dung ca cac snippets", "dung cac bac snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung cac cac snippets\") OR (\"dung nhan code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung cac cac snippets ) OR ( dung nhan code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung cac cac snippets") OR ("dung nhan code snippets"))) OR ("locating bug code snippets"))*.