Perhaps you should try some spelling variations:
nghia tu » nghia cua, nghia xa, nghia do
cua viet » ca viet, hoa viet, cua vat
vu sach » su sach, vu khach
cao hoi » cau hoi, co hoi, cao hoc
hieu le » hieu ve, hieu he, hieu ly
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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) OR (vu bach)) ky nang cao hoi. hieu le ((nghia tu) or (nghia duy)) va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ky nang cao hoi. hieu le ((nghia tu) OR (nghia duy)) va hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) ky nang cao hoi. hieu le ((nghia tu) or (nghia duy)) va hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) ky nang cao hoi. hieu le ((nghia tu) or (nghia duy)) va hanh di cua viet*.