Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao he dong snippets" » "cao ha dong snippets", "cao de dong snippets", "cao he cong snippets", "tao he dong snippets", "cao h dong snippets", "cac he dong 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: (((("cao he dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao he dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao he dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao he dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.