Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khan lai cua snippets" » "khau lai cua snippets", "phan loai cua snippets", "nhan loai cua snippets", "khan dai cua snippets", "khan hai cua snippets", "khan lai chau 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: (((("khan lai 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: (((("khan lai cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khan lai cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khan lai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.