Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
cam truc » cau truc, nam truc, nam truoc
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. hieu qua ((cam truc) or (lam truoc)) van hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. hieu qua ((cam truc) OR (lam truoc)) van hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. hieu qua ((cam truc) or (lam truoc)) van hanh vi va triet*.