Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"minh dan phan snippets" » "minh danh phan snippets", "minh doan phan snippets", "binh dan phan snippets", "minh dan chan snippets", "minh van phan 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 ("minh dan phan snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( minh dan phan snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("minh dan phan snippets"))) or ("locating bug code snippets"))*.