Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao danh con snippets" » "dao doanh con snippets", "do danh con snippets", "dao dan con snippets", "dao danh co snippets", "dao dang cong snippets", "dao danh ngon 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: (((("dao danh 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: (((("dao danh con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao danh con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao danh con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.