Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung quang li snippets" » "dang quang li snippets", "luong quang li snippets", "dung luan li snippets", "dung quan li snippets", "dung quang le snippets", "dung guang li 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 quang li snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dung quang li snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dung quang li snippets"))) OR ("locating bug core snippets"))*.