Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cham luc » cham soc, nhan luc, cham cuu
hieu ve » hieu van
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
may hoi » may thoi, tay hoi, mai hoi
cau cua » cau qua, ca cua, cu cua
y mang » cay mang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y mang may hoi. ((hieu ve) or (hieu va)) cham luc ((va danh) or (va hanh)) cau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y mang may hoi. ((hieu ve) OR (hieu va)) cham luc ((va danh) OR (va hanh)) cau cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach y mang may hoi. ((hieu ve) or (hieu va)) cham luc ((va danh) or (va hanh)) cau cua triet*.