Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va thanh » gia thanh, ban thanh, va tinh
dat duoc » dat nuoc, da duoc, luat duoc
thi lan » thi hanh, thi nang, thi lien
lan dat » dan dat, lap dat, ban dat
va hanh » van hanh, va danh, ban hanh
ty nang » ty xang, ty hang, ly nang
lam cua » nam cua, lam chat
su sach » so sach, vu sach
x hoi » xa hoi, o hoi, x ho

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 lan dat duoc ((va hanh) OR (va thanh)) lam cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) x hoi. thi lan dat duoc ((va hanh) OR (va thanh)) lam cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (ky nang)) x hoi. thi lan dat duoc ((va hanh) OR (va thanh)) lam cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ky nang)) x hoi. thi lan dat duoc ((va hanh) OR (va thanh)) lam cua viet*.