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