Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
sach tay » xach tay, sach hay, sach nay
tay mang » cay mang, tao mang, tay lang
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
ve cham » va cham, ve chat, vu cham
may hoi » may thoi, tay hoi, mai hoi
luc va » duc va, tuc va, loc va
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 tay mang may hoi. hieu ((ve cam) or (ve cham)) luc va hanh vi ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tay mang may hoi. hieu ((ve cam) OR (ve cham)) luc va hanh vi ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: so sach tay mang may hoi. hieu ((ve cam) or (ve cham)) luc va hanh vi ((cua triet) or (cua viet))*.