Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
thuc dan » thuc hanh, hoc dan, thuc vat
hieu ve » hieu va, hieu van
dan dan » dang dan, ban dan, dao dan
cuu tre » cua tre, cau tren, cau treo
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
dan de » dan den, dang de, van de
de cuu » de cua
o hoi » co hoi, o hoc, o hai

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

• Adding a wildcard symbol may retrieve word variants: vu sai ky nang o hoi. hieu ve cac thuc dan dan de cuu tre*.