Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
sach ly » sach y, sach lo, sach ty
so sach » so sanh, bo sach, co sach
tang ma » mang may, tang van
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ly ((nang cao) or (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) tuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly ((nang cao) OR (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) tuc va hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ly ((nang cao) or (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) tuc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sach ly ((nang cao) or (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) tuc va hanh vi cua viet*.