Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
cuu tre » cua tre, cau tren, cau treo
ve bao » te bao, va bao
ve cao » va cao, ve cac, ve co
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

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: su sach ky nang x hoi. hieu ((ve cao) OR (ve bao)) suc ((va hanh) OR (va thanh)) vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((ve cao) OR (ve bao)) suc ((va hanh) or (va thanh)) vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((ve cao) OR (ve bao)) suc ((va hanh) or (va thanh)) vi cuu tre*.