Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lenh van cau snippets" » "menh van cau snippets", "lenh va cau snippets", "lenh canh cau snippets", "lenh van dau snippets", "lenh van hau snippets", "lenh van chat 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: (((("lenh van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lenh van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lenh van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lenh van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.