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