Perhaps you should try some spelling variations:
su hien » su kien, thu hien, nhu hien
cam thu » nam thu, cac thu, ca thu
nang xa » lang xa, nang ma, mang xa
su tien » su kien, tu tieng, dau tien
dinh va » dinh van, dinh ve, tinh va
hieu ve » hieu va, hieu van
va dinh » van dinh, va kinh, va tinh
tu sac » tu sach, tu cac, tu san
thu va » thuc va, thue va, tu va
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang x)) hoi. hieu ve cam thu va dinh va ((su tien) OR (su hien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (nang x)) hoi. hieu ve cam thu va dinh va ((su tien) OR (su hien))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang x)) hoi. hieu ve cam thu va dinh va ((su tien) OR (su hien))*.