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