Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan huu toan snippets" » "dan huu code snippets", "dan huu tuan snippets", "dan cuu toan snippets", "dan huy toan snippets", "dang huu toan snippets", "dao huu toan snippets", "dan luu toan 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 huu toan 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 huu toan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan huu toan snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan huu toan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.