Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua triet » cua viet, su triet, va triet
va doanh » van doanh, vay doanh, va danh
cac thuc » cach thuc, cac thu, can thuc
cuu tre » cau tren, cau treo
cua tre » cua te, dua tren, cua thep
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
thuc va » thuc vat, thuc dan, thuc day
ve cac » va cac, vien cac

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 lang xa hoi. hieu ve cac thuc va doanh van ((((cua tre) OR (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ve cac thuc va doanh van ((((cua tre) OR (cuu tre))) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ve cac thuc va doanh van ((((cua tre) OR (cuu tre))) or (cua triet))*".