Perhaps you should try some spelling variations:
lam truong » lap truong, cac truong, xa truong
cua triet » cua viet, su triet, va triet
nam truc » nam truoc, nam thuc, nam trung
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sach 2 » sach y
2 nang » v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 2 nang ma hoi. hieu ve ((lam truong) or (nam truc)) van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 2 nang ma hoi. hieu ve ((lam truong) OR (nam truc)) van hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach 2 nang ma hoi. hieu ve ((lam truong) or (nam truc)) van hanh dai cua triet*.