Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra pham cua snippets" » "tra phan cua snippets", "tuan pham cua snippets", "tac pham cua snippets", "tra pham ca snippets", "tra phat cua snippets", "tra ham cua 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 pham cua 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 pham cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra pham cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra pham cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.