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