Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cao trung » cao truong, tao trung, bao trung
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
sach ly » sach y, sach lo, sach ty
vu sach » vu bach, su sach, vu khach
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu van
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. ((hieu ve) or (hieu va)) cao trung ((van hanh) OR (ban hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang x hoi. ((hieu ve) OR (hieu va)) cao trung ((van hanh) OR (ban hanh)) vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly nang x hoi. ((hieu ve) or (hieu va)) cao trung ((van hanh) OR (ban hanh)) vi cua triet*".