Perhaps you should try some spelling variations:
"dung tra trinh snippets" » "dung qua trinh snippets", "dung tri trinh snippets", "dung tru trinh snippets", "dung tren trinh snippets", "dung tra trinh slippers"
"dung dat code snippets" » "dung va code snippets", "dung tai code snippets", "dung rate code snippets", "dung dat de snippets", "dung dat code 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 dat code snippets\") OR (\"dung tra trinh snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung dat code snippets ) OR ( dung tra trinh snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung dat code snippets") OR ("dung tra trinh snippets"))) OR ("locating bug code snippets"))*.