Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach dau cuc snippets" » "sach dao cuc snippets", "sach dat cuc snippets", "sach mau cuc snippets", "sach dau cua snippets", "sach dau cuoi snippets", "sach dau nuoc 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: (((("sach dau cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach dau cuc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach dau cuc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach dau cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.