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