Perhaps you should try some spelling variations:
thanh doanh » hanh doanh, thanh toan, chinh doanh
doanh cua » doanh luan
va thanh » gia thanh, ban thanh, va tinh
nang ma » tang ma, sang ma, nang cao
sach ky » sach y, sach ty, sach kem
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cai
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
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) or (sac ky)) nang ma hoi. hieu ((va cam) OR (va cao)) luc va thanh doanh cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sac ky)) nang ma hoi. hieu ((va cam) OR (va cao)) luc va thanh doanh cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) or (sac ky)) nang ma hoi. hieu ((va cam) OR (va cao)) luc va thanh doanh cua te".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sac ky)) nang ma hoi. hieu ((va cam) OR (va cao)) luc va thanh doanh cua te*.