Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khan than do snippets" » "phan than do snippets", "khoan thanh do snippets", "khanh thanh do snippets", "khan than doc snippets", "khan thanh do snippets", "khan than vo 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: (((("khan than 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: (((("khan than do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khan than do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khan than do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.