Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
tan hanh » tan thanh, tang hanh, toan hanh
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hanh di » hanh vi, hanh de, hang di
tu ban » thu ban, te ban
ban ky » van ky, dan ky

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: "tu ban ky nang xa hoi. hieu van pham duc tan hanh di ((cua triet) OR (va triet))~".
• Adding a wildcard symbol may retrieve word variants: tu ban ky nang xa hoi. hieu van pham duc tan hanh di ((cua triet) OR (va triet))*.