Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"van thuan dat snippets" » "van tuan dat snippets", "van than dat snippets", "van quan dat snippets", "van thuat dam snippets", "van thuat vat snippets", "van chuan dao 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 ("van thuan dat snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( van thuan dat snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("van thuan dat snippets"))) or ("locating bug core snippets"))*.