Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu xuat » hieu luat, hieu suat, chiet xuat
hanh vai » hanh vi, hanh va, hanh tai
xuat xay » luat xay, thuat xay, xuat va
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
xay duc » xa duc, xay dung, xuan duc
tu sach » thu sach, su sach, tu cach
lo hang » ly hang, le hang, cho hang
te sach » toc sach
va hoi » xa hoi, va hoc
va hoa » van hoa, va hoc, ma hoa

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)) lo hang ((va hoi) or (va hoa)). hieu xuat xay duc va hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) lo hang ((va hoi) OR (va hoa)). hieu xuat xay duc va hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) lo hang ((va hoi) or (va hoa)). hieu xuat xay duc va hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) lo hang ((va hoi) or (va hoa)). hieu xuat xay duc va hanh vai cua triet*.