Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"khoa viet da snippets" » "khoa viet code snippets", "khoan viet da snippets", "hoa viet da snippets", "thoai viet da snippets", "khoa viet dao snippets", "khoa viet dat snippets", "khoa viet ha 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: (((("khoa viet da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa viet da snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( khoa viet da snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa viet da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.