Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban danh son snippets" » "ban doanh son snippets", "ban hanh son snippets", "ban dan son snippets", "ban anh son snippets", "ban dang son snippets", "ban dinh son 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: (((("ban danh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban danh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban danh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban danh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.