Perhaps you should try some spelling variations:
day danh » day manh, dai danh, dao danh
thuc day » thuc dan, thuc vat
cau thuc » cau truc, cuu thuc, can thuc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
sach v » sach va, sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
vi va » vi van, vai va, bi va
vu va » vu van, tu va, su va

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 v nang ma hoi. ((hieu ve) OR (hieu va)) cau thuc day danh ((vi va) OR (vu va)) triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach v nang ma hoi. ((hieu ve) or (hieu va)) cau thuc day danh ((vi va) or (vu va)) triet*.