Perhaps you should try some spelling variations:
cham vuc » cham soc, cham cuu, cham va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
van han » van hanh, van phan, van nhan
han tri » han tai, van tri, thanh tri
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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 ((cham vuc) or (pham duc)) van han tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ve ((cham vuc) OR (pham duc)) van han tri va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ve ((cham vuc) or (pham duc)) van han tri va thiet*.