Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
thu sach » tu sach, thuat sach, thuoc sach
danh vai » danh sai, danh va, dang van
cham xuc » cam xuc, chat xuc, cham soc
cau tren » cu tren, dau tren, ca tren
cac khoi » cac thoi, cac khoan, cach thoi
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
va cham » va chat, va tham
y nang » ky nang, ly nang, v nang
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: thu sach y nang ((mai hoi) or (cac khoi)). 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: thu sach y nang ((mai hoi) OR (cac khoi)). 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: "thu sach y nang ((mai hoi) or (cac khoi)). hieu va cham xuc va ((danh vai) OR (doanh van)) cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((mai hoi) or (cac khoi)). hieu va cham xuc va ((danh vai) OR (doanh van)) cau tren*.