Perhaps you should try some spelling variations:
thanh doanh » hanh doanh, thanh toan, chinh doanh
doanh cua » doanh luan
sach ky » sach y, sach ty, sach kem
qua cam » qua cham, qua cac, qua ca
nang ma » tang ma, sang ma, nang cao
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
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 hoa. hieu qua cam ((luc va) or (tuc 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 hoa. hieu qua cam ((luc va) OR (tuc 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 hoa. hieu qua cam ((luc va) or (tuc va)) thanh doanh cua te".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) OR (sac ky)) nang ma hoa. hieu qua cam ((luc va) or (tuc va)) thanh doanh cua te*.