Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
dau tuc » dau tu, dao tuc, cau truc
tuc van » thuc van, truc van, tuc va
hanh di » hanh vi, hanh de, hang di
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
va dau » va dao
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 y nang x hoi. lieu va dau tuc van hanh di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. lieu va dau tuc van hanh di ((cua tre) OR (cua te))*.