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