Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua viet » ca viet, hoa viet, cua vat
va doanh » van doanh, vay doanh, va danh
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tu sach » su sach, te sach, tu cach
cau luc » cau truc, cau phuc
van cau » van dau, van hau, van chat
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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) OR (thu sach)) ky nang x hoi. hieu van cau luc va doanh van ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu van cau luc va doanh van ((cua tre) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang x hoi. hieu van cau luc va doanh van ((cua tre) or (cua viet))*".