Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cau treo » cau theo, cau tren, cau triet
dau truc » cau truc, dai truc, doan truc
vu khach » vu khanh, vu khac, vay khach
va doanh » van doanh, vay doanh, va danh
cua tre » cua te, cuu tre, cua triet
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
thi van » thi lan, thi hanh, thi nang
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
van dau » van dao, phan dau
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu khach)) ky tang ma hoi. thi van dau truc va doanh van ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) ky tang ma hoi. thi van dau truc va doanh van ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) ky tang ma hoi. thi van dau truc va doanh van ((cua tre) or (cau treo))*.