Perhaps you should try some spelling variations:
"dung data code snippets" » "dung dat code snippets", "dung dan code snippets", "dung dau code snippets", "dung rate code snippets", "dung data code slippers"
"dung hoc dan snippets" » "dong hoc dan snippets", "dung thuoc dan snippets", "trung hoc dan snippets", "dung hoc dan 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 hoc dan snippets\") OR (\"dung data code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung hoc dan snippets ) OR ( dung data code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung hoc dan snippets") OR ("dung data code snippets"))) OR ("locating bug code snippets"))*.