Perhaps you should try some spelling variations:
"va thi cong snippets" » "va thi code snippets", "va tai cong snippets", "va thien cong snippets", "van thi cong snippets", "vu thi cong snippets", "ha thi cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") OR ("va thi cong snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( va thi cong snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("va thi cong snippets"))) or ("locating bug core snippets"))*.