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