Perhaps you should try some spelling variations:
van thiet » va thiet, dan thiet, can thiet
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
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 hoi. hieu ve cham ((xuc va) OR (tuc va)) hanh vi van thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang ma hoi. hieu ve cham ((xuc va) OR (tuc va)) hanh vi van thiet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ma hoi. hieu ve cham ((xuc va) OR (tuc va)) hanh vi van thiet*.