Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham cuu » cap cuu, chat cua
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
lai cua » dai cua, hai cua, lai chau
su sac » su sach, su cac
su xac » pu xac, su cac
cua su » qua su

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 cuu van hanh lai cua su~.
• 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 cuu van hanh lai cua su".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ky dang ha noi. hieu van cham cuu van hanh lai cua su*.