Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao cong tot snippets" » "cac cong tot snippets", "cao dang tot snippets", "cua cong tot snippets", "cao cong dot snippets", "cao cong mot snippets", "cao dong tot 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: (((("cao cong tot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao cong tot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao cong tot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao cong tot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.