Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che khoa cua snippets" » "chi khoa cua snippets", "chua khoa cua snippets", "chai khoa cua snippets", "che hoa cua snippets", "che kho cua snippets", "che khoe cua 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 cua 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 cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che khoa cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che khoa cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.