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