Perhaps you should try some spelling variations:
doanh cua » doanh luan
van doanh » toan doanh, van dong, van thanh
ve triet » va trien
su triet » su viet, su tien
sach ky » sach y, sach ty, sach kem
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cham tu » pham tu, cam tu, chai tu
tu van » tu va
sac ky » cac ky, sai ky

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) OR (sac ky)) nang xa hoi. hieu ve cham tu van doanh cua ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu ve cham tu van doanh cua ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang xa hoi. hieu ve cham tu van doanh cua ((su triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu ve cham tu van doanh cua ((su triet) or (ve triet))*.