Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
bach hoa » bach khoa, bach ha, cach hoan
thuc dan » thuc hanh, hoc dan, thuc vat
sach hoa » sach ha, sach hoi, cach hoan
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va cau » van cau, va cac, va dau
cua te » cua tu

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

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