Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoat van don snippets" » "hoa van don snippets", "hat van don snippets", "hoang van don snippets", "hoat van dong snippets", "hoat van doan snippets", "hoat van dan 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: (((("hoat van don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoat van don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoat van don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoat van don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.