Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi viet con snippets" » "dai viet con snippets", "hoi viet con snippets", "oi viet con snippets", "doi viet co snippets", "doi diet con snippets", "doi giet con 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: (((("doi viet con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi viet con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi viet con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi viet con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.