Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
sach tu » sach thu, cach tu, sach ty
vai cua » dai cua, hai cua, lai cua
cao duc » dao duc, cao suc, tao duoc
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
ma hoi » mai hoi, xa hoi, me hoi

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 ((ma hoi) OR (ma hoa)). hieu va ((cao duc) or (giao duc)) ban thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu nang ((ma hoi) OR (ma hoa)). hieu va ((cao duc) OR (giao duc)) ban thanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu nang ((ma hoi) OR (ma hoa)). hieu va ((cao duc) or (giao duc)) ban thanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: vu sach tu nang ((ma hoi) OR (ma hoa)). hieu va ((cao duc) or (giao duc)) ban thanh vai cua triet*.