Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung tap toan snippets" » "dung tai toan snippets", "dung tay toan snippets", "dung lap toan snippets", "dung tap doan snippets", "dung tap quan snippets", "dung bai toan 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 ("dung tap toan snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dung tap toan snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dung tap toan snippets"))) or ("locating bug core snippets"))*.