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