Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"huu hanh php snippets" » "huu han php snippets", "luu hanh php snippets", "thuc hanh php snippets", "huu hanh phap snippets", "huu thanh pho snippets", "huu hanh phuc 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 ("huu hanh php snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( huu hanh php snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("huu hanh php snippets"))) or ("locating bug code snippets"))*.