Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
ban thanh » ban hanh, ban hang
day thuc » dan thuc, dai thuc, dam thuc
nay thuc » nam thuc, nhan thuc, cay thuoc
cay thuc » cay thuoc, can thuc, cach thuc
vu sach » vu bach, su sach, vu khach
doi cua » dai cua, hoi cua
cua tuc » cua duc, cua tu, cua thuoc
sach ky » sac ky, sach y, sach ty
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang ha hoi. hieu qua ((nay thuc) or (((day thuc) or (cay thuc)))) ban thanh doi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang ha hoi. hieu qua ((nay thuc) OR (((day thuc) OR (cay thuc)))) ban thanh doi cua tuc.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang ha hoi. hieu qua ((nay thuc) or (((day thuc) or (cay thuc)))) ban thanh doi cua tuc*.