Perhaps you should try some spelling variations:
ban thanh » ban hanh
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
dang xay » dang van, van xay
ban hang » ngan hang
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
lang ha » long ha
vi cua » vai cua, di cua
va nam » van nam, ha nam, va nay

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 ly ((dang xay) or (lang ha)) hoi. lieu va nam thuc ((ban thanh) or (ban hang)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((dang xay) OR (lang ha)) hoi. lieu va nam thuc ((ban thanh) OR (ban hang)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly ((dang xay) or (lang ha)) hoi. lieu va nam thuc ((ban thanh) or (ban hang)) vi cua triet*.