Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
tu sac » tu sach, tu san, tu bac
vi cua » vai cua, di 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 sac) OR (tu cac)) ky lang xa hoi. hieu van pham duc ((van hanh) or (ban hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky lang xa hoi. hieu van pham duc ((van hanh) OR (ban hanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu cac)) ky lang xa hoi. hieu van pham duc ((van hanh) or (ban hanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu cac)) ky lang xa hoi. hieu van pham duc ((van hanh) or (ban hanh)) vi cua triet*.