Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van ban
nhan luc » nang luc
van anh » van thanh, tuan anh, van minh
su sach » so sach, vu sach
hieu cu » hieu cua, hieu ca, hieu su
va nang » van nang, da nang, cam nang
vu nang » vuc nang, vu dang, v nang
cu nhan » ca nhan
ve su » va su

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 ((vu nang) OR (va nang)) ma hoa. hieu cu nhan luc ((van hanh) or (van anh)) ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((vu nang) OR (va nang)) ma hoa. hieu cu nhan luc ((van hanh) OR (van anh)) ve su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((vu nang) OR (va nang)) ma hoa. hieu cu nhan luc ((van hanh) or (van anh)) ve su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((vu nang) OR (va nang)) ma hoa. hieu cu nhan luc ((van hanh) or (van anh)) ve su triet*.