Perhaps you should try some spelling variations:
vuc nang » cuc nang, chuc nang, van nang
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
vu nang » va nang, vu dang, v nang
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
su viet » so viet
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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 ((vu nang) OR (vuc nang)) xa hoi. hieu va cam xuc van hanh vi su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((vu nang) OR (vuc nang)) xa hoi. hieu va cam xuc van hanh vi su viet".
• Adding a wildcard symbol may retrieve word variants: su sach ((vu nang) OR (vuc nang)) xa hoi. hieu va cam xuc van hanh vi su viet*.