Perhaps you should try some spelling variations:
van thiet » dan thiet, can thiet, van thien
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xuc van » duc van, luc van, vuc van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang ma hoa. hieu ve cham xuc van hanh vi ((van thiet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ma hoa. hieu ve cham xuc van hanh vi ((van thiet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ma hoa. hieu ve cham xuc van hanh vi ((van thiet) or (va thiet))*.