Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vat duoc de snippets" » "dat duoc de snippets", "luat duoc de snippets", "xuat duoc de snippets", "vat buoc de snippets", "vat duoc do snippets", "vat duoc dien 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 duoc de 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 duoc de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vat duoc de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vat duoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.