Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va triet » va thiet, va trien, ve triet
cham tuc » nham thuc, pham thuc, tham thuc
sach tay » xach tay, sach hay, sach nay
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
tang van » dang van, hoang van, trong van
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
so sach » so sanh, bo sach, co sach
tuc va » thuc va, truc va, tuc xa

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 tay ((mang may) or (tang van)) hoi. hieu van cham tuc va danh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tay ((mang may) OR (tang van)) hoi. hieu van cham tuc va danh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: so sach tay ((mang may) or (tang van)) hoi. hieu van cham tuc va danh vi ((va triet) or (cua viet))*.