Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"trinh dan o snippets" » "trinh han o snippets", "trinh van o snippets", "trinh san o snippets", "trinh dan mo snippets", "trinh dan so snippets", "trinh doan o 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.

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