Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, lam truoc, nam truoc
van nang » van quang, van dong, van dung
van hanh » van thanh, ban hanh, van anh
nam truc » nam truoc, nam thuc, nam trung
kem cua » em cua, keo cua, diem cua
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((van nang) OR (van ban)) x hoi. hieu ve ((cam truc) or (nam truc)) van hanh kem cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((van nang) OR (van ban)) x hoi. hieu ve ((cam truc) OR (nam truc)) van hanh kem cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((van nang) OR (van ban)) x hoi. hieu ve ((cam truc) or (nam truc)) van hanh kem cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((van nang) OR (van ban)) x hoi. hieu ve ((cam truc) or (nam truc)) van hanh kem cua triet*.