Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
mai khoi » mai khoa, cac khoi, dai khoa
tai khoa » da khoa, noi khoa
hanh tai » thanh tai, hang tai, han tai
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau treo
ky lang » ky nang, ky dang, ky tang
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, va cam

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 lang ((mai khoi) OR (tai khoa)). hieu ve cam tuc va hanh tai ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky lang ((mai khoi) OR (tai khoa)). hieu ve cam tuc va hanh tai ((cuu tre) or (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky lang ((mai khoi) OR (tai khoa)). hieu ve cam tuc va hanh tai ((cuu tre) or (cau tren))*.