Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
luu van » cuu van, luu hanh
hanh ve » hanh vi, hanh va, hanh kem
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
ve su » va su
luan » quan, lan

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: tu sach ((y nang) OR (v nang)) xa hoi. hieu vu cham ((luu van) OR (luan van)) hanh ve su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) xa hoi. hieu vu cham ((luu van) OR (luan van)) hanh ve su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. hieu vu cham ((luu van) OR (luan van)) hanh ve su triet*.