Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan hat do snippets" » "xuan ha do snippets", "xuan hao do snippets", "xuan nhan do snippets", "xuan hat doi snippets", "xuan hat dao snippets", "xuan hat de 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 hat do 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 hat do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan hat do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan hat do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.