Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va trien » va truyen, va thiet, va tuyen
dang xay » dang van, van xay
lang xa » lang ha, lang van
sach ky » sac ky, sach y, sach ty
qua cam » qua cham, qua cac, qua ca
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
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: su sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam xuc va hanh vi ((cua triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam xuc va hanh vi ((cua triet) or (va trien))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam xuc va hanh vi ((cua triet) or (va trien))*.