Perhaps you should try some spelling variations:
"do ung cong snippets" » "do ung code snippets", "do dung cong snippets", "do luong cong snippets", "do duong cong snippets", "do trung cong snippets", "do quang 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 ("do ung cong snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( do ung cong snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("do ung cong snippets"))) or ("locating bug core snippets"))*.