Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
thanh do » thanh de, thanh pho, thanh hoa
thanh di » thanh doi, thanh de, thanh dinh
hieu van » hieu va, thien van, lieu va
van cac » van hac, van cau, van bac
cac lop » cac hop, cac loai
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh, ky dang
ty danh » ty doanh, ty anh, te danh
lop va » lap va, hop va, nop va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ((ty danh) or (ky danh)) xay hoi. hieu van cac lop va ((thanh di) or (thanh do)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ((ty danh) OR (ky danh)) xay hoi. hieu van cac lop va ((thanh di) OR (thanh do)) cua te.
• Adding a wildcard symbol may retrieve word variants: vu khach ((ty danh) or (ky danh)) xay hoi. hieu van cac lop va ((thanh di) or (thanh do)) cua te*.