Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
dieu hien » dieu khien, dieu kien, bieu hien
doanh dan » doanh ban, doanh van, doanh dao
hien cam » hien cac, hien cau, hien giam
thu sach » tu sach, thuat sach, thuoc sach
tang ma » mang may, tang van
xuc vay » xuc hay
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
cac cau » cac mau, bac cau, cac cam
ma hoi » mai hoi, xa hoi, ma hoa
ca cau » cua cau, can cau, co cau
ca cac » cua cac, va cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky tang ma hoi. dieu hien cam xuc vay doanh dan ((((ca cau) OR (ca cac))) or (cac cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang ma hoi. dieu hien cam xuc vay doanh dan ((((ca cau) OR (ca cac))) OR (cac cau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ma hoi. dieu hien cam xuc vay doanh dan ((((ca cau) OR (ca cac))) or (cac cau))*".