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