Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang doc » nang luc
doc hoi » duoc hoi, hoc hoi, doc hai
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
hai cua » thai cua, dai cua, hoi cua
sac ky » sai ky
va am » va lam, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (cac ky)) nang doc hoi. lieu va am thuc ((va danh) OR (va dinh)) hai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (cac ky)) nang doc hoi. lieu va am thuc ((va danh) OR (va dinh)) hai cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (cac ky)) nang doc hoi. lieu va am thuc ((va danh) OR (va dinh)) hai cua triet*.