Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
su hien » su kien, su tien, thu hien
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
lang xa » lang ha, dang xay, lang van
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang

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: vu sach o lang xa hoi. hieu qua cac xuc ((va hanh) OR (va danh)) vi ((cua triet) OR (su hien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach o lang xa hoi. hieu qua cac xuc ((va hanh) OR (va danh)) vi ((cua triet) or (su hien))~".
• Adding a wildcard symbol may retrieve word variants: vu sach o lang xa hoi. hieu qua cac xuc ((va hanh) OR (va danh)) vi ((cua triet) or (su hien))*.