Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len khoa can snippets" » "lien khoa can snippets", "lon khoa can snippets", "men khoa can snippets", "len khoa cam snippets", "len khoa cap snippets", "len 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: (((("len 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: (((("len khoa can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len khoa can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.