Perhaps you should try some spelling variations:
"using java cong snippets" » "using java code snippets", "using data cong snippets", "using va cong snippets", "using java can snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung trong dat snippets" » "dung trong dam snippets", "dung trong dan snippets", "dung trong dao 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 cong snippets") or ("dung trong dat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java cong snippets") OR ("dung trong dat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java cong snippets ) or ( dung trong dat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java cong snippets") or ("dung trong dat snippets"))) or ("locating bug core snippets"))*.