Perhaps you should try some spelling variations:
sach thuc » cach thuc, sach thu, sach thue
thu sach » tu sach, thuat sach, thuoc sach
hanh lam » thanh lap, hanh kem, hanh va
va triet » va trien, ve triet, cua triet
hanh lu » hanh tu, hanh xu, hanh su
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
lu hoi » le hoi, luat hoi
ve cac » va cac, vien cac
tuc va » truc va, tuc xa, duc va
thiet » thieu

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 thuc hanh lu hoi. hieu ve cac ((tuc va) or (thuc va)) hanh lam ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thuc hanh lu hoi. hieu ve cac ((tuc va) OR (thuc va)) hanh lam ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: thu sach thuc hanh lu hoi. hieu ve cac ((tuc va) or (thuc va)) hanh lam ((va triet) or (va thiet))*.