Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nguy ton cho snippets" » "nguy co cho snippets", "nguy tao cho snippets", "nguy toan cho snippets", "nguy ton kho snippets", "nguy trong cho 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: (((("nguy ton cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguy ton cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nguy ton cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nguy ton cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.