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