Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
phan duc » pham duc, phan tu, phan dau
hieu van » hieu va, thien van, lieu va
phan luc » nhan luc, phan suc, than luc
va trien » va truyen, va thiet, va tuyen
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
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: tu sach ky nang x hoi. hieu van ((phan luc) or (phan duc)) van hanh vi ((va trien) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu van ((phan luc) OR (phan duc)) van hanh vi ((va trien) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu van ((phan luc) or (phan duc)) van hanh vi ((va trien) or (su triet))*.