Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che quoc da snippets" » "che duoc da snippets", "he quoc da snippets", "che thuoc da snippets", "che quoc dan snippets", "che quoc dat snippets", "che quoc va 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: (((("che quoc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che quoc da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che quoc da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che quoc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.