Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tre cao snippets" » "duoc tren cao snippets", "duc tien cao snippets", "duc te cao snippets", "duc tre can snippets", "duc tren cay 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: (((("duc tre 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: (((("duc tre cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tre cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tre cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.