Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
vuc nang » cuc nang, chuc nang, van nang
nhan luc » nang luc
cu nhan » ca nhan
su sach » so sach, vu sach
vu nang » va nang, vu dang, v nang
hieu cu » hieu cua, hieu ca, hieu su
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 (vuc nang)) ma hoa. hieu cu nhan luc ((van hanh) or (van minh)) ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((vu nang) OR (vuc nang)) ma hoa. hieu cu nhan luc ((van hanh) OR (van minh)) ve su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((vu nang) OR (vuc nang)) ma hoa. hieu cu nhan luc ((van hanh) or (van minh)) ve su triet*".