Perhaps you should try some spelling variations:
van thiet » va thiet, dan thiet, can thiet
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, vuc van
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
tu san » thu san, tu ban, tu can
tu bac » tu ban, tu cac, tu bat
tu sac » tu sach, tu cac, tu lac

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) OR (tu bac))) or (tu san)) ky sang ma hoi. hieu ve cham xuc van hanh vi van thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sac) OR (tu bac))) OR (tu san)) ky sang ma hoi. hieu ve cham xuc van hanh vi van thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sac) OR (tu bac))) or (tu san)) ky sang ma hoi. hieu ve cham xuc van hanh vi van thiet".
• Adding a wildcard symbol may retrieve word variants: ((((tu sac) OR (tu bac))) or (tu san)) ky sang ma hoi. hieu ve cham xuc van hanh vi van thiet*.