Perhaps you should try some spelling variations:
ban thanh » ban hanh
cu triet » cua triet, cau triet, su triet
ban hang » ngan hang
dinh cu » dinh cuu, dinh chuc, dinh chau
su sach » so sach, vu sach
nam mua » nam cua, nam qua, nam xua
sach ty » sach y, sach tu, sach thu
nang ho » nang hoc, nang co, tang ho
hieu ha » hieu hoa, hieu va, hieu ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((nang x) or (nang ho)) hoi. hieu ha nam mua ((ban thanh) OR (ban hang)) dinh cu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang x) OR (nang ho)) hoi. hieu ha nam mua ((ban thanh) OR (ban hang)) dinh cu triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang x) or (nang ho)) hoi. hieu ha nam mua ((ban thanh) OR (ban hang)) dinh cu triet*".