Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che thuy do snippets" » "che thuoc do snippets", "thi thuy do snippets", "thu thuy do snippets", "che thuyet do snippets", "che thay doi snippets", "che thuat 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: (((("che thuy 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: (((("che thuy do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che thuy do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che thuy do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.