Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
thi hanh » thi thanh
thi nang » thi cong, ki nang
hieu ve » hieu va, hieu van
van cuu » van cau, van chu, van cu
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty hang) or (((thi hanh) or (thi nang)))) xa hoi. hieu ve cam tuc va doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (((thi hanh) OR (thi nang)))) xa hoi. hieu ve cam tuc va doanh van cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (((thi hanh) or (thi nang)))) xa hoi. hieu ve cam tuc va doanh van cuu tre*.