Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
truc dang » truc dan, thuoc dang, truc trang
hieu van » hieu va, thien van, lieu va
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
hanh de » hanh ve, hanh kem
van cau » van dau, van hau, van chat
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
te bai » te bao, te ban, te lai

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: ((te bai) OR (te tai)) ky lang ha hoi. hieu van cau truc dang hanh de ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te bai) OR (te tai)) ky lang ha hoi. hieu van cau truc dang hanh de ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: ((te bai) OR (te tai)) ky lang ha hoi. hieu van cau truc dang hanh de ((cua tre) or (cuu tre))*.