Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
mai hoi » mai khoi, dai hoi, lai hoi
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
cua tre » cua te, cuu tre, cua triet
tu cam » tu cham, tu cac, tu nam
cam ky » cao ky, cac ky
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cam ky nang ((mai hoi) or (dai hai)). hieu ve cam tuc ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cam ky nang ((mai hoi) OR (dai hai)). hieu ve cam tuc ban thanh vi cua tre*.