Perhaps you should try some spelling variations:
sang tao » hang tai
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu va » hieu qua
va hanh » van hanh, va danh, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky sang tao hoi. ((hieu va) or (lieu va)) cac nuoc ((va hanh) or (va thanh)) cao su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky sang tao hoi. ((hieu va) OR (lieu va)) cac nuoc ((va hanh) OR (va thanh)) cao su triet.
• Adding a wildcard symbol may retrieve word variants: so sanh ky sang tao hoi. ((hieu va) or (lieu va)) cac nuoc ((va hanh) or (va thanh)) cao su triet*.