Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
su triet » su viet, su tien
van hanh » van thanh, ban hanh, van anh
ve triet » va trien
va triet » va thiet, va trien, cua triet
chat hoc » chat hoa, chat thom, cho hoc
hoc van » hoc dan, hoc va, hoc vat
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
xac ky » cac ky, sac ky, bac ky
ha hoi » hoa hoi, ha noi, xa hoi
su xac » pu xac, su cac

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

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