Perhaps you should try some spelling variations:
than thong » than thuong, toan thong, tran thong
sach nham » sach nha, sach tham, sach han
nham thuc » nhan thuc, nam thuc, nham thu
thu thong » thuy thong, thu thang, thu tuong
sach pham » sach tham, sach phat, sach phap
pham thuc » phap thuc, pham chuc, pham thu
khoa than » khoa luan, hoa thai, hoa tan
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa thu » hoai thu, ho thu
so sach » so sanh, bo sach, co sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach nham thuc anh khoa thu thong ) or ( so sach pham thuc anh khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach nham thuc anh khoa thu thong ) OR ( so sach pham thuc anh khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach nham thuc anh khoa thu thong ) or ( so sach pham thuc anh khoa than thong ))*.