Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kieu van cac snippets" » "hieu van cac snippets", "sieu van cac snippets", "lieu van cac snippets", "kieu van hac snippets", "kieu van cau snippets", "kieu van bac 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: (((("kieu van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kieu van cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kieu van cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kieu van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.