Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"dung trong chu snippets" » "dung trong thu snippets", "dung trong cho snippets", "dung trong che 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: "((((\"dang java java snippets\") OR (\"dung trong chu snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dang java java snippets ) OR ( dung trong chu snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") OR ("dung trong chu snippets"))) OR ("locating bug code snippets"))*.