Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
qua tham » qua cham, qua than, qua thanh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » tay hoi, cay phoi, gay thoi
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
ve su » va su

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: su sach ky dang ((xay hoi) OR (xa hoi)). hieu qua tham thuc va hanh ve su triet~.
• Adding a wildcard symbol may retrieve word variants: su sach ky dang ((xay hoi) or (xa hoi)). hieu qua tham thuc va hanh ve su triet*.