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