Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong khoa he snippets" » "dong khoa code snippets", "duong khoa he snippets", "dung khoa he snippets", "dong hoa he snippets", "dong khoa hoc snippets", "dong khong he snippets"
"python using java snippets" » "python using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("dong khoa he snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dong khoa he snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( dong khoa he snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("dong khoa he snippets"))) or ("locating bug core snippets"))*.