Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan nam co snippets" » "quang nam co snippets", "xuan nang co snippets", "xuan nhan co snippets", "xuan nam cao snippets", "xuan nam bo snippets", "xuan nam so 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: (((("xuan nam co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan nam co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan nam co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan nam co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.