Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toan ho cong snippets" » "toan hoc cong snippets", "toan khoa cong snippets", "toan cao cong snippets", "toan cho cong snippets", "toan hoa cong 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 cong 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 cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan ho cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan ho cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.