Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xep tinh son snippets" » "diep tinh son snippets", "yen tinh son snippets", "ve tinh son snippets", "xep tinh toan snippets", "xep dinh so snippets", "xep tinh hoc 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: (((("xep tinh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xep tinh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xep tinh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xep tinh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.