Perhaps you should try some spelling variations:
cau thuc » cuu thuc, can thuc, cau phuc
hoa lang » hoa dan, hoa van
lang van » dang van, tang van, hoang van
sach hoa » sach ha, sach hoi, bach hoa
hanh ve » hanh vi, hanh va
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
van hoi » van hoa, van hoc, van hoe
cua te » cua tu

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 hoa lang van hoi. hieu va ((cau thuc) OR (cau truc)) dan ((hanh ve) OR (hanh kem)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoa lang van hoi. hieu va ((cau thuc) OR (cau truc)) dan ((hanh ve) or (hanh kem)) cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach hoa lang van hoi. hieu va ((cau thuc) OR (cau truc)) dan ((hanh ve) or (hanh kem)) cua te*.