Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vai cua » dai cua, hai cua, lai cua
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
bo sach » co sach, hoc sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
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: ((su sach) or (bo sach)) ky lang xa hoi. hieu va cam tuc van hanh ((vi cua) OR (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) ky lang xa hoi. hieu va cam tuc van hanh ((vi cua) OR (vai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) ky lang xa hoi. hieu va cam tuc van hanh ((vi cua) OR (vai cua)) triet*".