Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan can do snippets" » "xuan cang do snippets", "xuan tan do snippets", "xuan chanh do snippets", "xuan can bo snippets", "xuan ban do snippets", "xuan van do 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 can 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 can do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan can do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan can do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.