Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc nan cua snippets" » "hoc nang cua snippets", "hoc nano cua snippets", "hoc nhan cua snippets", "hoc ban cua snippets", "hoc nam cua 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: (((("hoc nan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc nan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc nan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc nan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.