Perhaps you should try some spelling variations:
vien sau » vien dai, vien da, nien su
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
cam thu » nam thu, cac thu, ca thu
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
kien su » nien su, tien su, bien sua
su sach » so sach, vu sach
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 ky nang x hoi. hieu ve ((cam thu) or (nam thuc)) va hanh ((kien su) or (vien sau)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ve ((cam thu) OR (nam thuc)) va hanh ((kien su) OR (vien sau)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ve ((cam thu) or (nam thuc)) va hanh ((kien su) or (vien sau)) triet*.