Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet so ca snippets" » "viec so ca snippets", "viet o ca snippets", "viet co ca snippets", "viet so cap snippets", "viet so cau snippets", "viet so cay 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 so ca 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 so ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet so ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet so ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.