Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han dau cau snippets" » "hang dau cau snippets", "phan dau cau snippets", "van dau cau snippets", "han mau cau snippets", "han dat cau snippets", "han da cau 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 dau cau 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 dau cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han dau cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han dau cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.