Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc cau chap snippets" » "duc cau cham snippets", "duc cau chan snippets", "duc cau phap snippets", "duc hau chap snippets", "duc mau chap snippets", "duc cac chap 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: (((("duc cau chap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc cau chap snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc cau chap snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc cau chap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.