Perhaps you should try some spelling variations:
dat duoc » dat nuoc, da duoc, luat duoc
duoc van » duoc va, duc van, duoc ban
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
thi van » thi lan, thi hanh, thi nang
van dat » van dao, van dau, dan dat
hanh va » hang va, hanh vi
ca viet » va viet, co viet, hoa viet
x hoi » xa hoi, o hoi, x ho
va ca » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (ky nang)) x hoi. thi van dat duoc van hanh va ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) x hoi. thi van dat duoc van hanh va ca viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ky nang)) x hoi. thi van dat duoc van hanh va ca viet*.