Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"con huong cau snippets" » "cong huong cau snippets", "con duong cau snippets", "mon huong cau snippets", "con thuong chau snippets", "con huong dan snippets", "con huong cua snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java code snippets\") OR (\"con huong cau snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( con huong cau snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("con huong cau snippets"))) OR ("locating bug code snippets"))*.