Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dam thuc » am thuc, dan thuc, dai thuc
nam thuc » nam thuoc, am thuc, nam thu
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua

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 xa hoi. hieu ve ((dam thuc) or (nam thuc)) van hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve ((dam thuc) OR (nam thuc)) van hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve ((dam thuc) or (nam thuc)) van hanh vai cua triet*.