Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lam sach toi snippets" » "nam sach toi snippets", "pham sach toi snippets", "lam sang toi snippets", "lam sach doi snippets", "lam sach hoi snippets", "lam sach moi 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: (((("lam sach toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lam sach toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lam sach toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lam sach toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.