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