Perhaps you should try some spelling variations:
trung thuoc » trung thuc, trung quoc, trung hoc
phau thong » phap thong, khau thong, phan thong
thang khoa » hang khoa, thong khoa, thanh hoa
sach trung » mach trung, sach thuong, sach dung
thuoc xanh » tuoc xanh, thuoc thanh, thuoc ban
xanh khong » nganh khong, anh thong, benh khong
nam thang » nam thanh, nam trong, nam trung
khoa phau » hoa phan, khoa kham, khoa than
sach thi » sach thu, sach tai, sach thieu
khong he » khong khi, hong ha, khong _
su sach » so sach, vu sach
thi nam » thai nam, thi tam, chi nam
tu sach » thu sach, te sach, tu cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach thi nam thang khoa phau thong ) or ( tu sach trung thuoc xanh khong he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach thi nam thang khoa phau thong ) OR ( tu sach trung thuoc xanh khong he thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach thi nam thang khoa phau thong ) or ( tu sach trung thuoc xanh khong he thong ))*.