Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
hanh vai » hanh va, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
sang ma » tang ma, nang ma, sang tao
san ky » sang ky, van ky, dan ky
tuc va » thuc va, truc va, tuc xa
tu san » thu san, tu ban, tu can

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 san ky ((sang ma) OR (mang may)) hoi. hieu van cam tuc va ((hanh vai) OR (hanh vi)) dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((sang ma) or (mang may)) hoi. hieu van cam tuc va ((hanh vai) OR (hanh vi)) dau tren~".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((sang ma) or (mang may)) hoi. hieu van cam tuc va ((hanh vai) OR (hanh vi)) dau tren*.