Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhin viet do snippets" » "nhan viet do snippets", "nghia viet do snippets", "chinh viet do snippets", "nhin viet dao snippets", "nhin viet doi snippets", "nhin viet o 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: (((("nhin viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhin viet do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhin viet do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhin viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.