Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"
"dong cua phan snippets" » "dung cua phan snippets", "cong cua phan snippets", "huong cua phan snippets", "dong cua nhan snippets", "dong cua phap snippets", "dong cua han 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: (((("dong cua phan snippets") or ("python using raw snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cua phan snippets") OR ("python using raw snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong cua phan snippets ) or ( python using raw snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cua phan snippets") or ("python using raw snippets"))) or ("locating bug core snippets"))*.