Perhaps you should try some spelling variations:
"o cao hoat snippets" » "o cao code snippets", "o co hoat snippets", "o cao chat snippets", "o dan hoat snippets", "o lao hoat snippets", "o cac hoat 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 ("o cao hoat snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( o cao hoat snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("o cao hoat snippets"))) or ("locating bug core snippets"))*.