Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va danh, ban hanh
vi cua » vai cua, di cua
cua te » cua tu
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ky nang xa hoi. hieu va am thuc ((va hanh) OR (va thanh)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ky nang xa hoi. hieu va am thuc ((va hanh) OR (va thanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: bo sach ky nang xa hoi. hieu va am thuc ((va hanh) OR (va thanh)) vi cua te*.