Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc bao doi snippets" » "du bao doi snippets", "duc dao doi snippets", "duc ban doi snippets", "duc bo doi snippets", "duc tao doi snippets", "duc trao doi 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: (((("duc bao doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc bao doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc bao doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc bao doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.