Perhaps you should try some spelling variations:
van cham » van chat, van tham, van pham
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
ky dang » ky danh
lai cua » dai cua, hai cua, lai chau
va cham » va chat, va tham
su sac » su sach, su cac, su xac
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 sac ((ky dang) or (ky nang)) ha noi. hieu ((van cham) or (va cham)) luc van hanh lai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky dang) OR (ky nang)) ha noi. hieu ((van cham) OR (va cham)) luc van hanh lai cua tu.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky dang) or (ky nang)) ha noi. hieu ((van cham) or (va cham)) luc van hanh lai cua tu*.