Perhaps you should try some spelling variations:
quan hanh » quan thanh, quang thanh, quang khanh
ve triet » va trien
hieu sau » hieu su, hieu suat, tieu su
sau pham » san pham, su pham, cau pham
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
x hoi » xa hoi, o hoi, x ho

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: tu sai ky nang x hoi. hieu sau pham duc ((van hanh) OR (quan hanh)) di ((su triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang x hoi. hieu sau pham duc ((van hanh) or (quan hanh)) di ((su triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang x hoi. hieu sau pham duc ((van hanh) or (quan hanh)) di ((su triet) OR (ve triet))*.