Perhaps you should try some spelling variations:
luan phan » luan van, luan hoan
tieu luan » tieu chuan, hieu luat, tu luan
phan dau » phan tu, hang dau
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty hang, ly nang
dau van » dao van, dam van, dau va
su viet » so viet
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) OR (ty xang)) xa hoi. tieu luan phan dau van hanh vi su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) xa hoi. tieu luan phan dau van hanh vi su viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) xa hoi. tieu luan phan dau van hanh vi su viet*.