Perhaps you should try some spelling variations:
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
dau tuc » dau tu, dao tuc, cau truc
doi cua » dai cua
hoi cua » hoi chuc
va dau » va dao

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 ty nang xa hoi. lieu va dau tuc ((van hanh) OR (ban hanh)) ((doi cua) OR (hoi cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va dau tuc ((van hanh) OR (ban hanh)) ((doi cua) or (hoi cua)) te~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va dau tuc ((van hanh) OR (ban hanh)) ((doi cua) or (hoi cua)) te*.