Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"khoa dan dot snippets" » "khoa dan code snippets", "khoa dang dot snippets", "hoa dan dot snippets", "khoa can dot snippets", "khoa dan dat snippets", "khoa da dot snippets", "khoa dan dong 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 dan dot 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 dan dot snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( khoa dan dot snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dan dot snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.