Perhaps you should try some spelling variations:
dinh viet » ninh viet, danh viet, trinh viet
sang tai » hang tai, sang tao, tang tai
su sach » so sach, vu sach
ky sang » ky nang, ky dang, ky tang
dinh vi » dinh ve, dinh tri, dinh thi
sach ky » sac ky, sach y, sach ty
cua te » cua tu
loc va » hoc va, luc va
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
tai ha » thai ha, tai hai, tai nha

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 ky sang tai ha. hieu ((ve cam) OR (ve cac)) loc va ((dinh vi) or (dinh viet)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang tai ha. hieu ((ve cam) OR (ve cac)) loc va ((dinh vi) OR (dinh viet)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky sang tai ha. hieu ((ve cam) OR (ve cac)) loc va ((dinh vi) or (dinh viet)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky sang tai ha. hieu ((ve cam) OR (ve cac)) loc va ((dinh vi) or (dinh viet)) cua te*.