Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va trien » va truyen, va thiet, va tuyen
doc sac » doc sach, dac sac, hoc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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: doc sac ky nang xa hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi ((cua triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sac ky nang xa hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi ((cua triet) or (va trien))~".
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang xa hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi ((cua triet) or (va trien))*.