Perhaps you should try some spelling variations:
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa
ve dat » de dat, va dat, ve dao
va ban » van ban, va bai, va bao
vu ban » tu ban
nuoc » quoc, duoc, ngoc

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