Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"dac nhan cau snippets" » "cac nhan cau snippets", "danh nhan cau snippets", "ca nhan cau snippets", "dac nhanh cau snippets", "dac phan cau snippets", "dac nhan sau 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 ("dac nhan cau snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( dac nhan cau snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("dac nhan cau snippets"))) or ("locating bug code snippets"))*.