Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hang loi » thang loi, hang doi, tang loi
ban hang » ngan hang
truc ban » thuc ban, truc dan, truc van
cac truc » cau truc, cac tru, cac trung
hieu va » lieu va, hieu qua
su sach » vu sach
hieu ve » hieu van
so sach » so sanh, bo sach, co sach
v nang » va nang, vu nang, van nang
loi su » loai su, loi tu, lai su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) v nang x ho. ((hieu ve) OR (hieu va)) cac truc ban hang loi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) v nang x ho. ((hieu ve) OR (hieu va)) cac truc ban hang loi su triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) v nang x ho. ((hieu ve) OR (hieu va)) cac truc ban hang loi su triet*.