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