Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dong viet van snippets" » "cong viet van snippets", "dung viet van snippets", "dang viet van snippets", "dong viet nam snippets", "dong viet anh snippets", "dong viet ha 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 ("dong viet van snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dong viet van snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dong viet van snippets"))) or ("locating bug core snippets"))*.