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

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