Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
qua nam » quan nam, cua nam, quang nam

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 ky nang mai khoi. hieu qua nam thuc ban hanh vi ((cua triet) OR (su triet))~.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang mai khoi. hieu qua nam thuc ban hanh vi ((cua triet) or (su triet))*.