Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, dam thuc
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky tang ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang ma hoi. hieu ve ((cam tuc) OR (cam xuc)) van hanh vi ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky tang ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi ((cua triet) OR (va triet))*.