Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong li dong snippets" » "cong ti dong snippets", "hong li dong snippets", "cong hai dong snippets", "cong lai dong snippets", "cong lip dong snippets", "cong loi 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: (((("cong li 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: (((("cong li dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong li dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong li dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.