Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong nha so snippets" » "dong nhan so snippets", "dong nhat so snippets", "dong ha so snippets", "dong nha o snippets", "dong nha co 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: (((("dong nha so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong nha so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong nha so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong nha so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.