Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
su sach » vu sach
so sach » so sanh, bo sach, co sach
ty tang » tay tang, ty xang, ty hang
tang ma » mang may, tang van
qua cau » quan cau, qua cac, qua ca
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di 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) or (so sach)) ty tang ma hoi. hieu qua cau luc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty tang ma hoi. hieu qua cau luc van hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty tang ma hoi. hieu qua cau luc van hanh vi cua triet*.