Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngan danh de snippets" » "ngan hang de snippets", "ngan sach de snippets", "nhan dan de snippets", "ngan hanh de snippets", "ngan dan de snippets", "ngan dang de snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("ngan danh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngan danh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngan danh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngan danh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.