Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"do cong dan snippets" » "do cong san snippets", "do cong tan snippets", "do huong dan snippets", "doi cong dan snippets", "do hong dan snippets", "bo cong dan 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 ("do cong dan snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( do cong dan snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("do cong dan snippets"))) or ("locating bug core snippets"))*.