Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
cham xuc » cam xuc, chat xuc, cham soc
ty trang » ta trang, te trang, tu trang
trang xa » trang va, trang ha, trong xa
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
sach ty » sach y, sach tu, sach thu
hieu su » hieu sau, tieu su, hieu so
hieu vu » hieu va, hieu ve, dieu vu
cuu tre » cua tre, cau tren, cau treo
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 ty trang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va ((hanh va) or (doanh ban)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty trang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va ((hanh va) OR (doanh ban)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty trang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va ((hanh va) or (doanh ban)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty trang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va ((hanh va) or (doanh ban)) cuu tre*.