Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
trung van » truong van, trong van, trung va
cau trung » cau truong, cac trung, cao trung
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
hieu ve » hieu van
nang xa » lang xa, nang ma, mang xa
di cua » dai cua, doi cua, de 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 y ((nang xa) OR (nang x)) hoi. ((hieu ve) or (hieu va)) cau trung van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu va)) cau trung van hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) or (hieu va)) cau trung van hanh di cua triet*".