Perhaps you should try some spelling variations:
"viet dung dat snippets" » "viet hung dat snippets", "viet huong dat snippets", "viet trung dat snippets", "viet dung va snippets", "viet dung tai snippets", "viet dung dat slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: "((((\"viet dung dat snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( viet dung dat snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("viet dung dat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.