Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
doanh dan » doanh ban, doanh van, doanh dao
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
duc vay » duc va, duc van, duc vy
dan cua » dan ca, ban cua, dai cua
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
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 ky nang ma hoi. hieu ((ve cam) or (ve cac)) duc vay doanh dan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu ((ve cam) OR (ve cac)) duc vay doanh dan cua te*.