Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, cau phuc
sach hoi » sach doi, sach moi, cach thoi
can thuc » dan thuc, van thuc, cay thuc
tu sach » thu sach, su sach, te sach
hanh ve » hanh vi, hanh va
hoi dan » hoa dan, hoc dan, hoi dap
hieu va » lieu va, hieu qua
cua te » cua tu
dan xa » dan xac, dan xay, dan ca

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 hoi dan xa hoi. hieu va ((cau thuc) OR (can thuc)) dan ((hanh ve) or (hanh kem)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dan xa hoi. hieu va ((cau thuc) OR (can thuc)) dan ((hanh ve) OR (hanh kem)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi dan xa hoi. hieu va ((cau thuc) OR (can thuc)) dan ((hanh ve) or (hanh kem)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dan xa hoi. hieu va ((cau thuc) OR (can thuc)) dan ((hanh ve) or (hanh kem)) cua te*.