Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cao luc » bao luc, cao duc, cao suc
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
ca cua » co cua
va cao » va cac, va co, va dao

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 y ((nang xa) OR (nang ma)) hoi. hieu va cao luc ((va hanh) or (va danh)) ca cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang ma)) hoi. hieu va cao luc ((va hanh) OR (va danh)) ca cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang ma)) hoi. hieu va cao luc ((va hanh) or (va danh)) ca cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) OR (nang ma)) hoi. hieu va cao luc ((va hanh) or (va danh)) ca cua triet*.