Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
ngoai ky » ngoai khu, nuoi ky, ngoai 1
truc van » truc va, thuc van, truc ban
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ma hoi » xa hoi, ma hoa, me hoi
de cau » le cau, da cau, de cai
ke cau » ket cau
ve cau » va cau, ve cac, le cau
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: nuoc ngoai ky nang ((ma hoi) OR (mai hoi)). hieu ve cau truc van thanh ((de cau) or (ke cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ngoai ky nang ((ma hoi) OR (mai hoi)). hieu ve cau truc van thanh ((de cau) OR (ke cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ngoai ky nang ((ma hoi) OR (mai hoi)). hieu ve cau truc van thanh ((de cau) or (ke cau)) tren".
• Adding a wildcard symbol may retrieve word variants: nuoc ngoai ky nang ((ma hoi) OR (mai hoi)). hieu ve cau truc van thanh ((de cau) or (ke cau)) tren*.