Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
hanh de » hanh ve, hanh kem

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu van cam thuc van hanh de ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu van cam thuc van hanh de ((cua triet) OR (su triet))*.