Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cham cuu » cap cuu, chat cua
van doan » van toan, van hoan, van dan
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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 y nang ma hoa. hieu ve cham cuu ((van doan) or (van doanh)) van ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoa. hieu ve cham cuu ((van doan) OR (van doanh)) van ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoa. hieu ve cham cuu ((van doan) or (van doanh)) van ((cua te) OR (cua tu))*".