Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"van do hoang snippets" » "van do hong snippets", "van co hoang snippets", "van duc hoang snippets", "van dao hoang snippets", "van de hoang snippets", "van du hoang 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 ("van do hoang snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( van do hoang snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("van do hoang snippets"))) or ("locating bug core snippets"))*.