Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
su sach » so sach, vu sach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
van cam » van lam, van cau, van dam
loc va » hoc va, luc va
va cau » van cau, va cac, va dau

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 ((ky lang) OR (ky tang)) xa hoi. hieu ((van cam) OR (van nam)) loc va thanh va cau triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky tang)) xa hoi. hieu ((van cam) or (van nam)) loc va thanh va cau triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky tang)) xa hoi. hieu ((van cam) or (van nam)) loc va thanh va cau triet*.