Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung doi toan snippets" » "huong doi toan snippets", "dung tai toan snippets", "dung co toan snippets", "dung boi toan snippets", "dung doi tan snippets", "dung doi doanh 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 doi toan snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dung doi toan snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dung doi toan snippets"))) OR ("locating bug core snippets"))*.