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