Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan vien di snippets" » "dan viet di snippets", "nhan vien di snippets", "danh viet di snippets", "dan vien dai snippets", "dan vien da snippets", "dan vien du 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: (((("dan vien di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan vien di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan vien di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan vien di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.