Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
cau thuc » cau truc, cuu thuc, can thuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua

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: tu sach ky nang mai hoi. ((hieu ve) OR (hieu va)) cau thuc va hanh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang mai hoi. ((hieu ve) or (hieu va)) cau thuc va hanh vi cua triet*.