Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"van trinh co snippets" » "van thinh co snippets", "van tinh co snippets", "dan trinh co snippets", "van trinh do snippets", "van trinh cong snippets", "van trinh hoa 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 trinh co snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( van trinh co snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("van trinh co snippets"))) or ("locating bug core snippets"))*.