Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"doi van phan snippets" » "doi van phong snippets", "doi van thanh snippets", "doi luan phan snippets", "do van phan snippets", "doi va phan snippets", "doi ban phan 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 ("doi van phan snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( doi van phan snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("doi van phan snippets"))) or ("locating bug core snippets"))*.