Perhaps you should try some spelling variations:
"doi va cong snippets" » "doi va code snippets", "doi tai cong snippets", "doi cua cong snippets", "hoi va cong snippets", "noi va cong snippets", "dai va 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 ("doi va cong snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( doi va cong snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("doi va cong snippets"))) or ("locating bug core snippets"))*.