Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che khoa chi snippets" » "chi khoa chi snippets", "chua khoa chi snippets", "chai khoa chi snippets", "che khoa cham snippets", "che khoa chau snippets", "che ho chi 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: (((("che khoa chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che khoa chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che khoa chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che khoa chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.