Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
cham thuc » nham thuc, pham thuc, tham thuc
danh vai » danh sai, doanh van, dang van
ty trang » ta trang, te trang, tu trang
trang xa » trang va, trang ha, trong xa
co sach » bo sach, cuon sach, hoc sach
danh va » doanh va, hanh va, anh va
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ty trang xa hoi. hieu ve cham thuc va ((((danh vai) OR (danh va))) or (doanh ban)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ty trang xa hoi. hieu ve cham thuc va ((((danh vai) OR (danh va))) OR (doanh ban)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ty trang xa hoi. hieu ve cham thuc va ((((danh vai) OR (danh va))) or (doanh ban)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: co sach ty trang xa hoi. hieu ve cham thuc va ((((danh vai) OR (danh va))) or (doanh ban)) cuu tre*.