Perhaps you should try some spelling variations:
doanh cua » doanh luan
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
nang mai » nang ma, nang tai, lang mai
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
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: toc sach ky nang mai hoi. lieu ((va cam) OR (va cao)) luc ((va thanh) or (ban thanh)) doanh cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang mai hoi. lieu ((va cam) OR (va cao)) luc ((va thanh) OR (ban thanh)) doanh cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang mai hoi. lieu ((va cam) OR (va cao)) luc ((va thanh) or (ban thanh)) doanh cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang mai hoi. lieu ((va cam) OR (va cao)) luc ((va thanh) or (ban thanh)) doanh cua te*.