Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"tao cau phan snippets" » "tao chau phan snippets", "tao cuu phan snippets", "tao cac phan snippets", "tao cu phan snippets", "tao cao phan snippets", "tao sau 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.

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