Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
hanh ki » hanh vi, hanh ky, hanh kien
ban xa » ban va, ban ma, ban da
ve cam » ve cham, ve cac, va cam
ki su » ky su

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 ban xa hoi. hieu ve cam luc van hanh ki su triet~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) van ban xa hoi. hieu ve cam luc van hanh ki su triet*.