Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban nhan cao snippets" » "ban than cao snippets", "van nhan cao snippets", "ban thanh cao snippets", "ban nha cao snippets", "ban nhan tao snippets", "ban nhan co 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: (((("ban nhan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban nhan cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban nhan cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban nhan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.