Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van chat » cao chat
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
van cau » van dau, van hau, toan cau
luc va » duc va, tuc va, loc va
v nang » va nang, vu nang, van nang
de su » den su, ve su, de tu

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 ((v nang) OR (cam nang)) xa hoi. hieu ((van cau) OR (van chat)) luc va danh de su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) or (cam nang)) xa hoi. hieu ((van cau) OR (van chat)) luc va danh de su triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (cam nang)) xa hoi. hieu ((van cau) OR (van chat)) luc va danh de su triet*.