Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh

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 ((cam tuc) or (nam thuc)) van hanh lai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh lai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ve ((cam tuc) or (nam thuc)) van hanh lai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve ((cam tuc) or (nam thuc)) van hanh lai ((cua triet) OR (va triet))*.