Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"trinh co quoc snippets" » "trinh do quoc snippets", "trinh cong quoc snippets", "trinh hoa quoc snippets", "trinh cao quoc snippets", "trinh co duoc snippets", "trinh bo quoc snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("trinh co quoc snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( trinh co quoc snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("trinh co quoc snippets"))) or ("locating bug core snippets"))*.