Perhaps you should try some spelling variations:
"dung nhan code snippets" » "dung luan code snippets", "dung nhan co snippets", "dung nhan con snippets", "dung nhan code slippers"
"dung dan trac snippets" » "dung dat trac snippets", "dung san trac snippets", "tung dan trac snippets", "dung dan tra snippets", "dung dang tran snippets", "dung dien trac snippets", "dung dan trac slippers"
"locating bug code snippets" » "locating bug code slippers", "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 nhan code snippets\") OR (\"dung dan trac snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung nhan code snippets ) OR ( dung dan trac snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung nhan code snippets") OR ("dung dan trac snippets"))) OR ("locating bug code snippets"))*.