Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"doi hoc trong snippets" » "doi hoc thuong snippets", "doi hoc tieng snippets", "doi dot trong snippets", "doi hoac trong snippets", "dai hoc trong snippets", "hoi hoc trong 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 ("doi hoc trong snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( doi hoc trong snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("doi hoc trong snippets"))) or ("locating bug core snippets"))*.