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