Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung le zheng snippets" » "dung lei zheng snippets", "dung li zheng snippets", "dung lue zhang snippets", "dung len zheng snippets", "dung he zheng snippets", "dung de zheng 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 le zheng snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dung le zheng snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dung le zheng snippets"))) or ("locating bug core snippets"))*.