Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
sach tu » sach thu, cach tu, sach ty
hieu va » hieu qua
dua ban » dia ban, cua ban, qua ban
san cua » sang cua, ban cua, dan cua
su sach » so sach, vu sach

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 tu ((nang xa) OR (nang ma)) hoi. ((hieu va) OR (lieu va)) chay dua ban thanh san cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu ((nang xa) or (nang ma)) hoi. ((hieu va) OR (lieu va)) chay dua ban thanh san cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach tu ((nang xa) or (nang ma)) hoi. ((hieu va) OR (lieu va)) chay dua ban thanh san cua triet*.