Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
vuc nang » cuc nang, vu nang, chuc nang
xuc van » duc van, luc van, vuc van
dau xuc » dau xac, dau xua, dau nuoc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
v nang » va nang, vu nang, van nang
vi cua » vai cua
di cua » dai cua, doi cua, de cua
va dau » va dao

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 ((v nang) or (vuc nang)) xa hoi. hieu va dau xuc van thanh ((vi cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (vuc nang)) xa hoi. hieu va dau xuc van thanh ((vi cua) OR (di cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (vuc nang)) xa hoi. hieu va dau xuc van thanh ((vi cua) or (di cua)) triet*.