Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dan hoi viet snippets" » "dan hai viet snippets", "dan oi viet snippets", "dan thai viet snippets", "dan hoc viet snippets", "dai hoi viet snippets", "dang khoi viet 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 hoi viet 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 hoi viet snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan hoi viet snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hoi viet snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.