Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"viet cho doi snippets" » "viet cho code snippets", "viec cho doi snippets", "viet co doi snippets", "viet theo doi snippets", "viet cho moi snippets", "viet cuoc doi snippets", "viet cho tuoi 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: (((("viet cho doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet cho doi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( viet cho doi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cho doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.