Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan vat moi snippets" » "phan van moi snippets", "nhan vat moi snippets", "phap vat moi snippets", "phan va moi snippets", "phan bat moi snippets", "phan vao moi 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: (((("phan vat moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan vat moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan vat moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan vat moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.