Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi bai cung snippets" » "doi ai cung snippets", "doi ban cung snippets", "doi dai cuong snippets", "hoi bai cung snippets", "doi boi cung 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 bai cung 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 bai cung snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi bai cung snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi bai cung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.