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
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va hanh » van hanh, va danh, ban hanh
vi cua » vai cua, di cua
cua te » cua tu
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 ky nang x hoi. hieu ve pham duc ((va hanh) OR (va thanh)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ve pham duc ((va hanh) OR (va thanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ve pham duc ((va hanh) OR (va thanh)) vi cua te*.