Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoan do he snippets" » "khoan di he snippets", "khoan o he snippets", "khoan so he snippets", "khoan do ke snippets", "khoan do le snippets", "khoan do ve 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: (((("khoan do he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoan do he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoan do he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoan do he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.