Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dong danh li snippets" » "dong doanh li snippets", "dong anh li snippets", "cong danh li snippets", "dong dan li snippets", "dong danh di snippets", "dong dinh li 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 ("dong danh li snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dong danh li snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dong danh li snippets"))) or ("locating bug core snippets"))*.