Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cuc tieu » muc tieu, cac tieu, cach tieu
thu sach » thuat sach, thuoc sach, thu hoach
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa

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)) ly nang ma hoi. hieu ve ((cam duc) or (giao duc)) van doanh tai cuc tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang ma hoi. hieu ve ((cam duc) OR (giao duc)) van doanh tai cuc tieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ly nang ma hoi. hieu ve ((cam duc) or (giao duc)) van doanh tai cuc tieu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ly nang ma hoi. hieu ve ((cam duc) or (giao duc)) van doanh tai cuc tieu*.