Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao khach do snippets" » "can khach do snippets", "cao thach do snippets", "vay khach do snippets", "cao khac do snippets", "cao khach deu snippets", "cao khac di 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: (((("cao khach 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: (((("cao khach do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao khach do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao khach do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.