Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cau tren » cu tren, dau tren, ca tren
thu sach » thuat sach, thuoc sach, thu hoach
ke trang » ke toan
trang xa » trang va, trang ha, trong xa
danh vai » danh sai, danh va, dang van
cham xuc » cam xuc, chat xuc, cham soc
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc va » duc va, tuc va, luc va

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