Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
vat hanh » vat thanh, van hanh, va hanh
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cau » quan cau, qua cac, qua ca
hanh gi » hanh vi, danh gia, hanh noi

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 ky lang xa hoi. hieu qua cau thuc vat hanh gi ((ve triet) OR (va trien))~.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu qua cau thuc vat hanh gi ((ve triet) or (va trien))*.