Perhaps you should try some spelling variations:
"dan cao dong snippets" » "dan cao code snippets", "dan cao dang snippets", "dan lao dong snippets", "dan cao cong snippets", "dan ca dong snippets", "dam cao dong snippets", "dan bao dong 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("dan cao dong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dan cao dong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( dan cao dong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("dan cao dong snippets"))) or ("locating bug core snippets"))*.