Perhaps you should try some spelling variations:
cau viet » ca viet, cao viet, cam viet
chu viet » che viet, khau viet, su viet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va dinh » van dinh, va kinh, va tinh
va cao » va cac, va co, va dao
cao tu » cao thu, co tu, cao su
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: te sach ky nang x hoi. hieu va cao tu va dinh van ((cau viet) OR (chu viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu va cao tu va dinh van ((cau viet) OR (chu viet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu va cao tu va dinh van ((cau viet) OR (chu viet))*.