Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu van
hieu va » lieu va, hieu qua
su sai » su tai, su hai, su mai
su dai » sau dai, si dai, su tai
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: ((su sai) or (su dai)) ky nang x hoi. ((hieu ve) OR (hieu va)) cau truc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su dai)) ky nang x hoi. ((hieu ve) OR (hieu va)) cau truc van hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) or (su dai)) ky nang x hoi. ((hieu ve) OR (hieu va)) cau truc van hanh vi cua triet*".