Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua cham » qua hai, qua cac, va cham
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, vu khach
su sach » so sach
ky danh » ky anh, ky dang
danh xa » danh ca, dinh xa, canh xa
va hanh » va thanh, va danh, ban hanh
vi cua » vai cua, di cua

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: ((vu sach) OR (su sach)) ky danh xa hoi. hieu qua cham luc ((va hanh) OR (van hanh)) vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ky danh xa hoi. hieu qua cham luc ((va hanh) or (van hanh)) vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) ky danh xa hoi. hieu qua cham luc ((va hanh) or (van hanh)) vi cua triet*.