Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh duc » thach duc, than duc, thinh duc
va thanh » gia thanh, ban thanh, va tinh
van hanh » ban hanh, van ban, van minh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
van anh » tuan anh, van minh
ca viet » va viet, co viet, hoa viet
vai ca » vai cac, vai cua, bai ca
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 thanh duc ((((van hanh) OR (van anh))) or (van thanh)) vai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu va thanh duc ((((van hanh) OR (van anh))) OR (van thanh)) vai ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu va thanh duc ((((van hanh) OR (van anh))) or (van thanh)) vai ca viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu va thanh duc ((((van hanh) OR (van anh))) or (van thanh)) vai ca viet*.