Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao than cui snippets" » "cao nhan cui snippets", "cao phan cui snippets", "cao tan cui snippets", "cao than cua snippets", "cao than nui snippets", "cao thanh qui 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 than cui 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 than cui snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao than cui snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao than cui snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.