Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"doan 2012 danh snippets" » "doan 2016 danh snippets", "doan 2010 danh snippets", "doan 2017 danh snippets", "doan 2012 doanh snippets", "doan 2012 dan snippets", "doan 2012 dinh snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("doan 2012 danh snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("doan 2012 danh snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( doan 2012 danh snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("doan 2012 danh snippets"))) or ("locating bug core snippets"))*.