Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van hanh » van thanh, ban hanh, van anh
hoc hoi » hoc khoi, hoc noi, hoc moi
hoc hoa » hoc khoa
hieu va » lieu va, hieu qua
hanh le » thanh le, hanh ve, hanh de
ho hoi » hoa hoi, hoi hoi, co hoi
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
tu van » tu va
le cua » ly cua
su sac » su sach, su cac, su xac

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