Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
cham luc » cham soc, nhan luc, cham cuu
vu khach » vu khanh, vu khac, vay khach
van nang » van quang, van ban, van dong
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
su tien » su kien, tu tieng, dau tien
luc van » luoc van, luu van, duc van
su sach » so sach, vu sach
su hien » su kien, thu hien, nhu hien
nang xa » nang x, lang xa, nang ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) van nang xa hoi. hieu van cham luc van hanh vi ((su tien) OR (su hien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khach)) van nang xa hoi. hieu van cham luc van hanh vi ((su tien) OR (su hien))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) van nang xa hoi. hieu van cham luc van hanh vi ((su tien) OR (su hien))*.