Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
dinh cau » dinh chau, dinh cuu, dinh cu
dao dinh » do dinh, dao minh, dao tinh
can thuc » dan thuc, van thuc, cay thuc
cac thuc » cach thuc, cac thu, cay thuc
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ky ((tang ma) or (nang cao)) hoi. hieu ve ((cac thuc) OR (can thuc)) ca dao dinh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ky ((tang ma) OR (nang cao)) hoi. hieu ve ((cac thuc) OR (can thuc)) ca dao dinh cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ky ((tang ma) or (nang cao)) hoi. hieu ve ((cac thuc) OR (can thuc)) ca dao dinh cau tren".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky ((tang ma) or (nang cao)) hoi. hieu ve ((cac thuc) OR (can thuc)) ca dao dinh cau tren*.