Perhaps you should try some spelling variations:
toan thiet » hoan thien, luan thiet, toan tien
dan thiet » luan thiet, doan thien, hanh thiet
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
va hanh » va thanh, va danh, ban hanh
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 ((va hanh) or (van hanh)) vi ((dan thiet) OR (toan thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ma hoa. hieu ve cham xuc ((va hanh) OR (van hanh)) vi ((dan thiet) OR (toan thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang ma hoa. hieu ve cham xuc ((va hanh) or (van hanh)) vi ((dan thiet) OR (toan thiet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ma hoa. hieu ve cham xuc ((va hanh) or (van hanh)) vi ((dan thiet) OR (toan thiet))*.