Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hoa lang » hoa dan, hoa van
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
su hien » su kien, su tien, thu hien
xuc va » duc va, tuc va, luc va
o 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) OR (hoa lang)) xa hoi. hieu qua cac xuc va hanh vi ((su triet) OR (su hien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((o lang) OR (hoa lang)) xa hoi. hieu qua cac xuc va hanh vi ((su triet) or (su hien))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((o lang) OR (hoa lang)) xa hoi. hieu qua cac xuc va hanh vi ((su triet) or (su hien))*.