Perhaps you should try some spelling variations:
cua truc » cua tuc, cua thuoc, cua trung
hanh tri » thanh tri, hanh tai, hanh trinh
ve triet » va trien
su triet » su viet, su tien
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
qua cua » quan cua, quang cua, qua quan
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ma hoi. hieu qua cua truc va hanh tri ((ve triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. hieu qua cua truc va hanh tri ((ve triet) OR (su triet))*.