Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong zu cho snippets" » "cong cu cho snippets", "cong tu cho snippets", "cong su cho snippets", "cong uu cho snippets", "cong vu cho snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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