Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cuon sach » duong sach, cuoc cach, co sach
cua triet » cua viet, su triet, va triet
sach tay » xach tay, sach hay, sach nay
tay tang » tay lang, tay trung, tay quang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: cuon sach tay tang ma hoi. hieu ve cham thuc va danh vi ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuon sach tay tang ma hoi. hieu ve cham thuc va danh vi ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: cuon sach tay tang ma hoi. hieu ve cham thuc va danh vi ((cua triet) or (cua vat))*.