Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao dan dong snippets" » "cao van dong snippets", "cao dan dung snippets", "cao dao dong snippets", "cao dang dong snippets", "cao danh dong snippets", "cac dan dong 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: (((("cao dan dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao dan dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao dan dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao dan dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.