Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan tang ca snippets" » "doan trang ca snippets", "doan quang ca snippets", "doan trung ca snippets", "doan tang cua snippets", "doan hang ca snippets", "doan tang ma 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: (((("doan tang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan tang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan tang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan tang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.