Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
dang xay » dang van, van xay
va triet » va thiet, ve triet, cua triet
hanh hai » thanh hai, nhanh hai, hang hai
sach ky » sac ky, sach y, sach ty
so sach » so sanh, bo sach, co sach
qua cua » quan cua, quang cua, qua quan
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
tuc va » thuc va, truc va, duc 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: so sach ky dang xay hoi. hieu qua cua ((tuc va) OR (tuc xa)) hanh hai ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xay hoi. hieu qua cua ((tuc va) OR (tuc xa)) hanh hai ((va triet) or (va trien))~".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xay hoi. hieu qua cua ((tuc va) OR (tuc xa)) hanh hai ((va triet) or (va trien))*.