Perhaps you should try some spelling variations:
ca viet » va viet, co viet, hoa viet
tuc van » thuc van, truc van, tuc va
hanh ve » hanh vi, hanh va
hoc hoi » hoc khoi, hoc hoa, hoc noi
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ho hoi » hoa hoi, hoi hoi, co hoi
ve cam » ve cham, ve cac, va cam

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