Perhaps you should try some spelling variations:
"dung using java snippets" » "dung ung java snippets", "dung sinh java snippets", "dung uong java snippets", "dung using data snippets"
"dung nang cac snippets" » "dun nang cac snippets", "dung dang cac snippets", "dung quang cac snippets", "dung nang cao snippets", "dung bang cac snippets", "dung hang cac 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 using java snippets\") OR (\"dung nang cac snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung using java snippets ) OR ( dung nang cac snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung using java snippets") OR ("dung nang cac snippets"))) OR ("locating bug code snippets"))*.