Perhaps you should try some spelling variations:
"dung doc trinh snippets" » "dung doc tinh snippets", "dung doi trinh snippets", "dung hoc trinh snippets", "dung coc trinh snippets", "dung doc trinh slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung 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 doc trinh snippets\") OR (\"dung dung code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung doc trinh snippets ) OR ( dung dung code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung doc trinh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets"))*.