Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
quan nam » quang nam, xuan nam, quan am
nam thuc » nam thuoc, am thuc, nam thu
vu sach » su sach, vu khach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
vi cua » di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu bach)) ky lang xa hoi. hieu quan nam thuc va hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ky lang xa hoi. hieu quan nam thuc va hanh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu bach)) ky lang xa hoi. hieu quan nam thuc va hanh ((vi cua) or (vai cua)) triet*.