Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
danh vai » danh sai, danh va, doanh van
ty trang » ta trang, te trang, tu trang
trang xa » trang va, trang ha, trong xa
cham tuc » nham thuc, pham thuc, tham thuc
so sach » so sanh, bo sach, co sach
cuu tre » cau tren, cau treo
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cua triet, dua tren
tuc va » thuc va, truc va, tuc xa

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

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