Perhaps you should try some spelling variations:
"cot hat cheo snippets" » "cot hat code snippets", "cot thuat cheo snippets", "cot nham cheo snippets", "cot nhat nheo snippets", "cost hat cheo 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: (((("cot hat cheo snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cot hat cheo snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cot hat cheo snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cot hat cheo snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.