Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc viet da snippets" » "duoc viet da snippets", "hoc viet da snippets", "toc viet da snippets", "doc viet dao snippets", "doc viet dat snippets", "doc 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: (((("doc 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: (((("doc viet da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc viet da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc viet da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.