Perhaps you should try some spelling variations:
"dong cuong cac snippets" » "dong duong cac snippets", "dong huong cac snippets", "dang cuong cac snippets", "dong luong cac snippets", "dong cong cac snippets", "dong trong cac snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 java java snippets\") OR (\"dong cuong cac snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( dong cuong cac snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("dong cuong cac snippets"))) OR ("locating bug code snippets"))*.