Perhaps you should try some spelling variations:
nhap doanh » nhuan doanh, lap doanh
doanh sai » doanh tai, danh sai, doan sai
thu nhap » thu ha, khu nha
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
cua tu » cua tuc, cua su, cua cu
le nam » ly nam, he nam, te nam
ma hoi » mai hoi, xa hoi, ma hoa
le na » le va, le ta, le ha

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 ((le nam) or (le na)) thu nhap doanh sai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu ((le nam) OR (le na)) thu nhap doanh sai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu ((le nam) or (le na)) thu nhap doanh sai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu ((le nam) or (le na)) thu nhap doanh sai ((cua te) OR (cua tu))*.