Perhaps you should try some spelling variations:
van hoe » van hoc, van hieu, van hien
hieu va » lieu va, hieu qua
nam xua » nam cua, nam mua, nam qua
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
su sai » su tai, su hai, su dai
sai ky » sac ky
va nam » van nam, ha nam, va nay
xua va » xuat va, vua va, sua va
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 sai ky nang ((van hoe) OR (van hoa)). hieu va nam xua va hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang ((van hoe) OR (van hoa)). hieu va nam xua va hanh ((vi cua) OR (vai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang ((van hoe) OR (van hoa)). hieu va nam xua va hanh ((vi cua) or (vai cua)) triet*".