Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
hoc khoi » hoc khoa, hoc hoa, hoc noi
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
ho hoi » hoc hoi, hoa hoi, hoi hoi
su xac » pu xac, su cac
tuc va » thuc va, truc va, tuc xa
ve cua » le cua, de cua, te cua
su sac » su sach, su cac

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 ((ho hoi) or (hoc khoi)). hieu van cam tuc va hanh ve cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang ((ho hoi) OR (hoc khoi)). hieu van cam tuc va hanh ve cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ky nang ((ho hoi) or (hoc khoi)). hieu van cam tuc va hanh ve cua viet*".