Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
van nhanh » van thanh, van khanh, van nhan
van hanh » van thanh, ban hanh, van anh
co viet » so viet, o viet, hoc viet
ve nham » ve nha, ve cham
hieu ve » hieu va, hieu van
su xac » pu xac, su cac
su sac » su sach, su cac
x hoi » xa hoi, o hoi, x ho
ly co » ty co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky nang x hoi. hieu ve nham thuc ((van nhanh) OR (van hanh)) ly co viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang x hoi. hieu ve nham thuc ((van nhanh) OR (van hanh)) ly co viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky nang x hoi. hieu ve nham thuc ((van nhanh) OR (van hanh)) ly co viet*".