Perhaps you should try some spelling variations:
dai luan » bai luan, dan luan, dat luan
dinh lai » dinh lam, dinh lap, dinh tai
te sach » toc sach
hieu vi » hieu voi, hieu va, hieu ve
luan va » luan van, luat va
va dinh » van dinh, va kinh, va tinh
lai cua » dai cua, hai cua, lai chau
y nang » ky nang, ly nang, v nang
vi dai » si dai, li dai, vien dai
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu vi dai luan va dinh lai cua tu*.