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