Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vat than cua snippets" » "vat thanh cua snippets", "van than cua snippets", "vat phan cua snippets", "vat nhan cua snippets", "vat thai cua snippets", "vat ban 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: (((("vat than 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: (((("vat than cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vat than cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vat than cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.