Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach thu cuc snippets" » "sach thue cuc snippets", "sach thieu cuc snippets", "sach tham cuc snippets", "sach thi cuc snippets", "sach thu tuc snippets", "sach thu cua 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 thu 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 thu cuc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach thu cuc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach thu cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.