Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"van dan nam snippets" » "van ban nam snippets", "ban dan nam snippets", "van dao nam snippets", "van van nam snippets", "van dong nam snippets", "van dinh nam 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 ("van dan nam snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van dan nam snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van dan nam snippets"))) or ("locating bug core snippets"))*.