Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua cham » qua hai, qua cac, va cham
luoc gia » luc gia, luong gia, nuoc giai
thanh ve » hanh ve, thanh va, thanh vien
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
ma hoi » mai hoi, ma hoa, me hoi
ve cua » le cua, de cua, te cua

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 hang ((ma hoi) OR (xa hoi)). hieu qua cham ((quoc gia) or (luoc gia)) thanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang ((ma hoi) OR (xa hoi)). hieu qua cham ((quoc gia) OR (luoc gia)) thanh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty hang ((ma hoi) OR (xa hoi)). hieu qua cham ((quoc gia) or (luoc gia)) thanh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty hang ((ma hoi) OR (xa hoi)). hieu qua cham ((quoc gia) or (luoc gia)) thanh ve cua triet*.