Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
vien cac » vien dai, vien da, gian cac
cua viet » ca viet, hoa viet, cua vat
ty sang » ty xang, ty hang, duy sang
tai hoi » tai khoi, dai hoi, tai hai
te sach » toc sach
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, tu cach
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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 sach) OR (te sach)) ty sang tai hoi. hieu ((vien cac) OR (vien bach)) tuc va hanh di cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ty sang tai hoi. hieu ((vien cac) or (vien bach)) tuc va hanh di cua viet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ty sang tai hoi. hieu ((vien cac) or (vien bach)) tuc va hanh di cua viet*.