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