Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tri » thanh tra, thanh tai, chinh tri
ban thanh » ban hanh, ban hang
cac nuoc » cap nuoc, hoc nuoc, cua nuoc
cac luc » cau luc, coc luc, cac cuoc
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
sach 7 » sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
7 tang » 6 tang

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 7 tang ma hoi. hieu ve ((cac luc) or (((cac nuoc) OR (dat nuoc)))) ban thanh tri cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 7 tang ma hoi. hieu ve ((cac luc) OR (((cac nuoc) OR (dat nuoc)))) ban thanh tri cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 7 tang ma hoi. hieu ve ((cac luc) or (((cac nuoc) OR (dat nuoc)))) ban thanh tri cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach 7 tang ma hoi. hieu ve ((cac luc) or (((cac nuoc) OR (dat nuoc)))) ban thanh tri cua triet*.