Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bot toan hoc snippets" » "boi toan hoc snippets", "bong toan hoc snippets", "bai toan hoc snippets", "bot toan khoa snippets", "bot van hoc snippets", "bot hoa hoc 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: (((("bot toan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bot toan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bot toan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bot toan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.