Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kiem tra cao snippets" » "kiem tra bao snippets", "kiem tra cau snippets", "kiem tra cho snippets", "kien tra cao snippets", "kim tra cao 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: (((("kiem tra cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kiem tra cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kiem tra cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kiem tra cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.