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