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