Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dong toan lua snippets" » "dung toan lua snippets", "bong toan lua snippets", "cong toan lua snippets", "dong toan luan snippets", "dong toan luat snippets", "dong toan cua 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 (\"dong toan lua snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dong toan lua snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dong toan lua snippets"))) OR ("locating bug core snippets"))*.