Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"do dan toan snippets" » "do van toan snippets", "do dan than snippets", "do manh toan snippets", "do danh toan snippets", "dao dan toan snippets", "do dang toan snippets"
"locating bug core snippets" » "locating bug 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 code snippets") OR ("do dan toan snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( do dan toan snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("do dan toan snippets"))) or ("locating bug core snippets"))*.