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