Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cau tren » cu tren, dau tren, ca tren
danh vai » danh sai, dang van, hanh vi
ke trang » ke toan
trang va » tran van, hang va
cham xuc » cam xuc, chat xuc, cham soc
danh va » doanh va, hanh va, anh va
tu sach » thu sach, su sach, te sach
sach ke » sach kem, sach de, sach che
va cham » va chat, va tham
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, luc va
va hoi » xa hoi, va hoc, va hoa

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

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