Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
cau thuc » cau truc, cuu thuc, can thuc
hanh va » hang va, hanh vi
hieu va » lieu va, hieu qua
sai ky » sac ky
va cau » van cau, va cac, va dau
va cua » va chua, via cua, ca 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: tu ((((sach thu) or (sach y))) or (sai ky)) nang x hoi. hieu va cau thuc day hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach thu) OR (sach y))) OR (sai ky)) nang x hoi. hieu va cau thuc day hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach thu) or (sach y))) or (sai ky)) nang x hoi. hieu va cau thuc day hanh va cua triet*.