Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
tu cao » cu cao, tu cac, vu cao
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, duc va
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 cao ky nang ((mai hoi) OR (dai hoc)). hieu ve cam ((tuc va) OR (tuc xa)) thanh vi cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu cao ky nang ((mai hoi) or (dai hoc)). hieu ve cam ((tuc va) or (tuc xa)) thanh vi cuu tre*.