Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
dau tren » dau tien, dat tren, dau tieng
su sach » so sach, vu sach
hieu te » hieu ve, hien te, hieu he
va hanh » van hanh, va danh, ban hanh
y nang » ky nang, ly nang, v nang
te ban » te bao
ban co » ban do, san co
vi dau » vi dai, va dau, bi dau
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 y nang x hoi. hieu te ban co ((va hanh) or (va thanh)) vi dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu te ban co ((va hanh) OR (va thanh)) vi dau tren.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu te ban co ((va hanh) or (va thanh)) vi dau tren*.