Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa viet mo snippets" » "khoan viet mo snippets", "hoa viet mo snippets", "thoai viet mo snippets", "khoa viet o snippets", "khoa viet co snippets", "khoa viet xo 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 viet mo 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 viet mo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa viet mo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa viet mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.