Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
xanh tai » hanh tai, anh tai, vanh tai
xanh tri » thanh tri, dinh tri, minh tri
mai khoi » mai khoa, tai khoa, cac khoi
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » dai hoi, lai hoi, mai doi
ky tang » ky nang, ky dang, kho tang
ban ky » van ky, dan ky
cuu va » cuu van, cuu ve
vu ban » tu ban, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ban ky tang ((mai hoi) or (mai khoi)). hieu ve cham cuu va ((xanh tri) OR (xanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ban ky tang ((mai hoi) OR (mai khoi)). hieu ve cham cuu va ((xanh tri) OR (xanh tai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ban ky tang ((mai hoi) or (mai khoi)). hieu ve cham cuu va ((xanh tri) OR (xanh tai)) cua tre*".