Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
hieu viec » nhieu viec, hieu ve, sieu viet
doanh van » doan van, doanh va, doanh ban
cau tren » cu tren, dau tren, ca tren
thu sach » tu sach, thuat sach, thuoc sach
viec cac » vien cac, viec cua, viec lam
cau treo » cau theo, cau triet, cau trieu
cuu tre » cua tre
nang xa » nang x, lang xa, nang ma
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van
y nang » ky nang, ly nang, v nang

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 xa hoi. hieu viec cac lo van doanh van ((((cuu tre) OR (cau tren))) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu viec cac lo van doanh van ((((cuu tre) OR (cau tren))) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu viec cac lo van doanh van ((((cuu tre) OR (cau tren))) or (cau treo))*".