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