Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
cam thuc » am thuc, nam thuc, cam thu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
qua cam » qua cham, qua cac, qua ca
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang ((mai hoi) OR (dai hoi)). hieu qua cam thuc va hanh vi ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v nang ((mai hoi) OR (dai hoi)). hieu qua cam thuc va hanh vi ((cua triet) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: so sach v nang ((mai hoi) OR (dai hoi)). hieu qua cam thuc va hanh vi ((cua triet) or (su triet))*.