Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
thanh vi » hanh vi, thanh va, thanh ve
ky sang » ky nang, ky dang, ky tang
thue va » thuc va, thuc vat, thuat va
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
hieu ve » hieu van
mai hoi » mai khoi, dai hoi, lai hoi
vi cuu » vi luu, vinh cuu

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 cac ky sang mai hoi. ((hieu ve) OR (hieu va)) cam ((thue va) OR (thuyet va)) thanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky sang mai hoi. ((hieu ve) or (hieu va)) cam ((thue va) OR (thuyet va)) thanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky sang mai hoi. ((hieu ve) or (hieu va)) cam ((thue va) OR (thuyet va)) thanh vi cuu tre*.