Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
duc van » duc va, duc tan, duc manh
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
su xac » pu xac, su cac
su sac » su sach, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky dang ha noi. hieu van cham duc van hanh ((vai cua) OR (hai cua)) thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky dang ha noi. hieu van cham duc van hanh ((vai cua) OR (hai cua)) thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky dang ha noi. hieu van cham duc van hanh ((vai cua) OR (hai cua)) thuoc".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky dang ha noi. hieu van cham duc van hanh ((vai cua) OR (hai cua)) thuoc*.