Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh hoc vo snippets" » "dan hoc vo snippets", "danh hoa vo snippets", "anh hoc vo snippets", "danh hoc va snippets", "danh hoc co snippets", "danh hoc vi 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 hoc vo 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 hoc vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh hoc vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh hoc vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.