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