Perhaps you should try some spelling variations:
thieu nien » thien nhien
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
nien cac » vien cac, dien cac, bien cac
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
tu sac » tu sach, tu cac, tu san

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((mai hoi) OR (dai hoi)). thieu nien cac xuc va hanh tai ((ca viet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((mai hoi) OR (dai hoi)). thieu nien cac xuc va hanh tai ((ca viet) or (va triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((mai hoi) OR (dai hoi)). thieu nien cac xuc va hanh tai ((ca viet) or (va triet))*.