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

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