Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
cac nuoc » hoc nuoc, dat nuoc, cua nuoc
cap nuoc » dat nuoc
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
va hanh » van hanh, va thanh, va danh
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 tu nang x hoi. hieu van ((cac nuoc) OR (cap nuoc)) ((va hanh) or (ban hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu nang x hoi. hieu van ((cac nuoc) OR (cap nuoc)) ((va hanh) OR (ban hanh)) vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu nang x hoi. hieu van ((cac nuoc) OR (cap nuoc)) ((va hanh) or (ban hanh)) vi cua triet*".