Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua nhan » cua nhan, qua nhat, qua phan
nhan tuc » nhan thuc, nhan luc, nhanh thuc
hanh doi » thanh doi, hanh noi, hang doi
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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: su sach y nang ma hoi. hieu qua nhan tuc va hanh doi ((cua tre) OR (cua triet))~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu qua nhan tuc va hanh doi ((cua tre) or (cua triet))*.