Perhaps you should try some spelling variations:
dang khai » dang khoi, dang hai, quang khai
hanh dai » hanh tai, hanh dao, vanh dai
khai hoi » khai hai, khi hoi, khoan hoi
chat luc » chat lua, nhan luc, chat huu
chat xuc » chat huu, cam xuc, chao xu
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
hieu du » hien du, hieu su, hiem du
sach ky » sac ky, sach y, sach ty
cua te » cua tu
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky dang khai hoi. hieu du ((chat luc) OR (chat xuc)) van hanh dai ((cua te) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang khai hoi. hieu du ((chat luc) OR (chat xuc)) van hanh dai ((cua te) OR (cua su))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang khai hoi. hieu du ((chat luc) OR (chat xuc)) van hanh dai ((cua te) or (cua su))*".