Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
doanh cua » doanh luan
cua triet » cua viet, su triet, va triet
qua chao » qua cham, qua cho, qua khao
tu sach » thu sach, su sach, tu cach
te sach » toc sach
cua cua » cua chua, ca cua, qua cua
y nang » ly nang, v nang, may nang
xu vay » tu vay, xu van

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) or (te sach)) ((y nang) OR (ky nang)) ma hoa. hieu qua chao xu vay doanh cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((y nang) OR (ky nang)) ma hoa. hieu qua chao xu vay doanh cua cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ((y nang) OR (ky nang)) ma hoa. hieu qua chao xu vay doanh cua cua triet*".