Perhaps you should try some spelling variations:
tang mai » tang ma, tang tai, lang mai
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
va hanh » va thanh, ban hanh, dao hanh
va danh » va dinh, va dan, dia danh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ca cua » co cua
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 tang mai hoi. hieu va cac xuc ((va danh) or (((va hanh) OR (van hanh)))) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang mai hoi. hieu va cac xuc ((va danh) OR (((va hanh) OR (van hanh)))) ca cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang mai hoi. hieu va cac xuc ((va danh) or (((va hanh) OR (van hanh)))) ca cua tre*".