Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh ho » doanh cho, doanh nho, doanh co
te sach » toc sach
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
ve cac » va cac, vien cac
ho cuu » ho chu, ho cua, so cuu
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang ((xay hoi) OR (tay hoi)). hieu ((ve cam) or (ve cac)) duc van doanh ho cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((xay hoi) OR (tay hoi)). hieu ((ve cam) OR (ve cac)) duc van doanh ho cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((xay hoi) OR (tay hoi)). hieu ((ve cam) or (ve cac)) duc van doanh ho cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((xay hoi) OR (tay hoi)). hieu ((ve cam) or (ve cac)) duc van doanh ho cuu tre*.