Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
thuc van » thuc vat, thuc dan, thuc va
van cham » van chat, van tham, va cham
xuc ban » duc ban, cuc ban, quoc ban
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi
vai va » mai va, dai va, hai va
tu sac » tu sach, tu cac, tu san

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 nang ((ma hoi) or (ma hoa)). hieu van cham ((thuc van) or (xuc ban)) hanh vai va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (ma hoa)). hieu van cham ((thuc van) OR (xuc ban)) hanh vai va thieu.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (ma hoa)). hieu van cham ((thuc van) or (xuc ban)) hanh vai va thieu*.