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

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