Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach tay » xach tay, sach hay, sach nay
va triet » va thiet, va trien, ve triet
tang van » dang van, hoang van, trong van
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
so sach » so sanh, bo sach, co sach
tang ma » mang may
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
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 ((tang ma) or (tang van)) hoi. hieu ve cam tuc va hanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tay ((tang ma) OR (tang van)) hoi. hieu ve cam tuc va hanh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: so sach tay ((tang ma) or (tang van)) hoi. hieu ve cam tuc va hanh vi ((va triet) or (cua viet))*.