Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang cau » nang cao, hang cau, nang dau
nam thuc » nam thuoc, am thuc, nam thu
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach ty, sach kem
va hanh » va thanh, va danh, ban hanh
tai cua » thai cua, tai cuc, tri cua
va nam » van nam, ha nam, va nay

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 ky) OR (sach y)) nang cau hoi. lieu va nam thuc ((va hanh) or (van hanh)) tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang cau hoi. lieu va nam thuc ((va hanh) OR (van hanh)) tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) nang cau hoi. lieu va nam thuc ((va hanh) or (van hanh)) tai cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) nang cau hoi. lieu va nam thuc ((va hanh) or (van hanh)) tai cua triet*.