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