Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"cac toc hieu snippets" » "cac toc thieu snippets", "cac doc hieu snippets", "cac hoc thieu snippets", "cac toi hieu snippets", "cac nuoc hieu snippets", "cac thoi hieu 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 ("cac toc hieu snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( cac toc hieu snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("cac toc hieu snippets"))) or ("locating bug core snippets"))*.