Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho can toan snippets" » "cho van toan snippets", "cho dan toan snippets", "cho manh toan snippets", "cho cac toan snippets", "cho phan toan snippets", "cho cong 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: (((("cho can 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: (((("cho can toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho can toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho can toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.