Perhaps you should try some spelling variations:
doanh qua » doanh quan, doanh cua, danh qua
cua triet » cua viet, su triet, va triet
cac truc » cau truc, cac tru, cac trung
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
qua cua » quan cua, quang cua, qua quan
y nang » ky nang, ly nang, v nang
me hoi » le hoi

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 y nang ((me hoi) or (ma hoa)). hieu qua cac truc va doanh qua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((me hoi) OR (ma hoa)). hieu qua cac truc va doanh qua cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((me hoi) or (ma hoa)). hieu qua cac truc va doanh qua cua triet*.