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