Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
hieu vi » hieu voi, hieu va, hieu ve
sach ty » sach tu, sach thu, xach tay
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
hai cua » thai cua, dai cua, hoi cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ty) or (sach y)) nang x hoi. hieu vi pham thuc ((va hanh) OR (va danh)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ty) OR (sach y)) nang x hoi. hieu vi pham thuc ((va hanh) OR (va danh)) hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ty) or (sach y)) nang x hoi. hieu vi pham thuc ((va hanh) OR (va danh)) hai cua triet".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ty) or (sach y)) nang x hoi. hieu vi pham thuc ((va hanh) OR (va danh)) hai cua triet*.