Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lee van toi snippets" » "le van toi snippets", "lieu van toi snippets", "lee gwan toi snippets", "lee van tai snippets", "lee van thi snippets", "lee van toan 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: (((("lee van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lee van toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lee van toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lee van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.