Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau trung » cau truong, cac trung, cao trung
trung va » truong va, trang va, trung ha
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
hieu ve » hieu van
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
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: vu sach ((ly nang) OR (ly hang)) xa hoi. ((hieu ve) or (hieu va)) cau trung va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ly nang) OR (ly hang)) xa hoi. ((hieu ve) OR (hieu va)) cau trung va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ly nang) OR (ly hang)) xa hoi. ((hieu ve) or (hieu va)) cau trung va hanh vi cua triet*".