Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet cao chu snippets" » "vien cao chu snippets", "viet co chu snippets", "viet ca chu snippets", "viet chao chu snippets", "viet cao cho snippets", "viet cho chu 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: (((("viet cao chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet cao chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet cao chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cao chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.