Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan viet doi snippets" » "dan viet code snippets", "danh viet doi snippets", "san viet doi snippets", "dao viet doi snippets", "dan viet duoi snippets", "dan viet voi snippets", "dan nhiet doi 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: (((("dan viet 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: (((("dan viet doi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan viet doi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan viet doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.