Perhaps you should try some spelling variations:
xang van » dang van, tang van, nang van
lang van » dang van, tang van, hoang van
cham tuc » nham thuc, pham thuc, tham thuc
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((xang van) OR (lang van)) hoi. hieu vu cham tuc va hanh di cua viet~".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((xang van) OR (lang van)) hoi. hieu vu cham tuc va hanh di cua viet*.