Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"hoc van long snippets" » "hoc van luong snippets", "hoc van dong snippets", "hoc van cong snippets", "hoc dan long snippets", "hoc va long snippets", "hoc vat long 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 ("hoc van long snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( hoc van long snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("hoc van long snippets"))) or ("locating bug core snippets"))*.