Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai dang cao snippets" » "dai dang cao snippets", "hai bang cao snippets", "hoi dang cao snippets", "hai nang cao snippets", "hai dang ca snippets", "hai dang cac 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: (((("hai dang 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: (((("hai dang cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai dang cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai dang cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.