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
su xach » su sach
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
lai cua » dai cua, hai cua, lai chau
su xac » pu xac, su cac
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su xac) or (su xach)) ky dang ha noi. hieu van cham cuu van hanh lai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su xac) OR (su xach)) ky dang ha noi. hieu van cham cuu van hanh lai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((su xac) or (su xach)) ky dang ha noi. hieu van cham cuu van hanh lai cua tu*.