Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi ton cho snippets" » "doi tan cho snippets", "doi toi cho snippets", "doi tuong cho snippets", "doi toan cho snippets", "doi ton kho snippets", "doi trong cho 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 ton cho 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 ton cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi ton cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi ton cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.