Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"phan ban dat snippets" » "phan banh dat snippets", "phan van dat snippets", "phan ba dat snippets", "phan ban dan snippets", "phan dan dat snippets", "phan ban dau snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs 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 core snippets") OR ("phan ban dat snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( phan ban dat snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("phan ban dat snippets"))) or ("locating bug code snippets"))*.