Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung hoc hoc snippets" » "dong hoc hoc snippets", "dung thuoc hoc snippets", "trung hoc hoc snippets", "dung hoc hoa snippets", "dung toc hoc snippets", "dung hoc hoi snippets"
"locating bug core snippets" » "locating bug 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 (\"dung hoc hoc snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dung hoc hoc snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dung hoc hoc snippets"))) OR ("locating bug core snippets"))*.