Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket van bon snippets" » "ket va bon snippets", "viet van bon snippets", "ket doan bon snippets", "ket van ban snippets", "ket van dong snippets", "ket van cong 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 bon 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 bon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket van bon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket van bon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.