Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"de dan duoc snippets" » "de da duoc snippets", "de dat duoc snippets", "de dan quoc snippets", "de dang duoc snippets", "de dao duoc snippets", "ke dan duoc 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 ("de dan duoc snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( de dan duoc snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("de dan duoc snippets"))) or ("locating bug core snippets"))*.